How to Convert ブログ

インターネット接続なしで使えるオフラインのファイル変換アプリ。お使いのパソコン上で、安全にプライバシーを守りながら変換できます。

Jake Manger3月28日

2026年におすすめの音声変換アプリ。無料・有料のツールでMP3、WAV、FLAC、AACなどを変換できます。

Jake Manger3月16日

2026年におすすめの動画変換アプリ。Mac・Windows・Linux向けの無料・有料ツールで、MP4、MOV、MKV、AVIなどを変換できます。

Jake Manger3月14日

2026年のファイル変換アプリを創業年とともにまとめた決定版リスト。何十年も使われてきた定番から、勢いのある新顔まで紹介します。

Jake Manger3月13日

Macで使えるファイル変換アプリをお探しですか。無料・有料あわせて18本を厳選し、動画・音声・画像・書類の変換を網羅しました。ご自身の作業に合う一本を見つけてください。

Jake Manger3月10日

An honest XnConvert comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 17

An honest Any Video Converter Ultimate comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 16

An honest NCH Prism Video Converter comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 15

An honest NCH Switch Audio Converter comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 14

An honest dBpoweramp comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 13

An honest Adobe Acrobat Pro comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 12

An honest Movavi Video Converter comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 11

An honest Wondershare UniConverter comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 10

An honest Permute comparison. I built How to Convert as the alternative I wanted: 5,438 conversions, $29 once with no subscription, and every file processed on your own computer.

Jake MangerAugust 9

Turn a Markdown file into an EPUB ebook in a few clicks, then fix the common heading, image and formatting problems.

Jake MangerAugust 1

Learn why journals normally use JATS, why technical books use DocBook and what to check after converting between them.

Jake MangerAugust 1

Choose EPUB when the text should resize for the screen, or PDF when the exact page layout needs to stay the same.

Jake MangerJuly 31

Convert a normal Word document to EPUB in a few clicks, understand what changes, and fix the common problems without digging through ebook internals.

Jake MangerJuly 31

Convert WMA, RealAudio and other old audio files into something modern while keeping the original recording safe.

Jake MangerJuly 30

Learn the difference between EPUB, PDF, MOBI and AZW3, and choose the format that works with the device you actually use.

Jake MangerJuly 30

Compare WAV and AIFF for PCM audio, metadata, Mac and Windows workflows, DAWs, sample libraries, archiving, and delivery.

Jake MangerJuly 29

Learn the difference between WAV, FLAC, MP3 and other audio formats, and why making an MP3 into FLAC does not restore quality.

Jake MangerJuly 29

Learn what an MKA file contains, why MP3 works in more places and how to make an MP3 copy without deleting the source.

Jake MangerJuly 28

Take the soundtrack out of an MKV video and save it as MP3, WAV or FLAC without uploading the video.

Jake MangerJuly 28

Turn scanned comic or manga pages into a correctly ordered CBZ with sensible image settings, cover handling, metadata, and quality checks.

Jake MangerJuly 27

Compare comic-book converter apps for CBZ, CBR, PDF, image extraction, page order, metadata, device output, batch jobs, and local privacy.

Jake MangerJuly 27

Convert a folder of PDF comics to ordered CBZ archives while checking page names, covers, spreads, image quality, and output counts.

Jake MangerJuly 26

Learn how CBZ, CBR and CBT files differ, which one most comic readers support and when a real conversion is needed.

Jake MangerJuly 26

Compare monthly subscriptions, free tools and one-time purchases based on how often you convert files and what the job actually needs.

Jake MangerJuly 25

Compare PDF and CBZ for digital comics, manga scans, page order, image quality, metadata, reader support, editing, and conversion.

Jake MangerJuly 25

Compare simpler and more flexible HandBrake alternatives for video, audio, images, documents and batch conversion.

Jake MangerJuly 24

Compare FFmpeg alternatives and graphical front ends for video, audio, images, batch conversion, presets, editing, and local privacy.

Jake MangerJuly 24

Compare CloudConvert alternatives for offline privacy, batch work, video, audio, images, documents and ebooks.

Jake MangerJuly 23

Compare Convertio alternatives for offline conversion, batch jobs, video, audio, documents and ebooks.

Jake MangerJuly 23

Use TIFF when you need a high-quality master and JPG when you need a smaller copy that is easy to share or upload.

Jake MangerJuly 22

Learn what RAW and JPG files are for, when to keep both and why converting a RAW file is not the same as editing it.

Jake MangerJuly 22

Compare WebP and AVIF for website photos, graphics, transparency, file size and browser support.

Jake MangerJuly 21

A clear PNG-versus-JPG guide for photos, screenshots, transparency, text, print, email, repeated editing, and file size.

Jake MangerJuly 21

Check pixels, aspect ratio, color, compression, and lab requirements before converting or sending photos to print.

Jake MangerJuly 20

Compare HEIC and JPG for iPhone storage, editing, sharing, metadata, compatibility, and long-term photo management.

Jake MangerJuly 20

Shrink photos and graphics privately by choosing the right dimensions, format, and quality in the right order.

Jake MangerJuly 19

Choose the right image size and format for a website, then make smaller JPG, WebP or AVIF copies without losing the original.

Jake MangerJuly 19

Convert a folder of iPhone HEIC photos to compatible JPG or editable PNG files in one private batch, without uploading the originals.

Jake MangerJuly 18

Convert a folder of images on your own computer, keep the originals safe and check the results before deleting anything.

Jake MangerJuly 18

The best RTF to Word converters in 2026. Compare offline desktop apps, open-source tools, and online converters for updating older rich text files into modern Word documents.

Jake MangerJune 22

The best Markdown to PDF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning Markdown notes, specs, and docs into shareable PDFs.

Jake MangerJune 22

The best Markdown to EPUB converters in 2026. Compare offline desktop apps, open-source tools, and online converters for publishing Markdown books, guides, and long-form docs as ebooks.

Jake MangerJune 22

The best Word to Markdown converters in 2026. Compare offline desktop apps, open-source tools, and online converters for moving Word drafts into GitHub, docs-as-code, and static site workflows.

Jake MangerJune 21

The best ODT to Word converters in 2026. Compare offline desktop apps, open-source tools, and online converters for sharing LibreOffice documents with Microsoft Word users.

Jake MangerJune 21

The best ODT to PDF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for exporting open document files as print-ready PDFs.

Jake MangerJune 21

The best EPUB to PDF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for printing ebooks, reviewing manuscripts, and sharing fixed-layout reading copies.

Jake MangerJune 20

The best Word to EPUB converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning Word manuscripts, guides, and documentation into ebooks.

Jake MangerJune 20

The best Word to HTML converters in 2026. Compare offline desktop apps, open-source tools, and online converters for publishing Word content on websites and documentation portals.

Jake MangerJune 20

The best PDF to PPTX converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning reports, handouts, and slide PDFs back into PowerPoint decks.

Jake MangerJune 19

The best PDF to ODT converters in 2026. Compare offline desktop apps, open-source tools, and online converters for editing PDF content in open document workflows.

Jake MangerJune 19

The best PDF to Text converters in 2026. Compare offline desktop apps, open-source tools, and online converters for extracting searchable plain text from reports, invoices, and archived files.

Jake MangerJune 19

The best MP4 to AAC converters in 2026. Compare offline desktop apps, open-source tools, and online converters for extracting AAC audio from MP4 videos without extra editing software.

Jake MangerJune 18

The best MOV to WAV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for getting uncompressed audio out of QuickTime files for editing.

Jake MangerJune 18

The best Word to PDF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for sending Word documents that should preserve layout and be easy to print.

Jake MangerJune 18

The best AVI to MKV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for archiving older video with subtitles, chapters, and multiple tracks.

Jake MangerJune 17

The best MOV to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for extracting audio from iPhone videos, lectures, and QuickTime recordings.

Jake MangerJune 17

The best AVI to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for pulling audio out of legacy video files.

Jake MangerJune 17

The best MKV to MP4 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for phones, smart TVs, social platforms, and client delivery.

Jake MangerJune 16

The best MOV to WebM converters in 2026. Compare offline desktop apps, open-source tools, and online converters for browser playback and web video publishing.

Jake MangerJune 16

The best MOV to GIF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning iPhone or QuickTime clips into short animated loops.

Jake MangerJune 16

The best MP4 to GIF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for short loops, reactions, support docs, and lightweight demos.

Jake MangerJune 15

The best AVI to MP4 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for modern playback, web uploads, and smaller video files.

Jake MangerJune 15

The best WebM to MP4 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for sharing browser video with apps and devices that expect MP4.

Jake MangerJune 15

The best MP4 to AVI converters in 2026. Compare offline desktop apps, open-source tools, and online converters for older Windows workflows, legacy players, and compatibility with old software.

Jake MangerJune 14

The best MP4 to MKV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for archiving video with multiple audio tracks, subtitles, or extra metadata.

Jake MangerJune 14

The best MP4 to MOV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for editing workflows, Apple apps, and clients who request QuickTime files.

Jake MangerJune 14

The best MP3 to AAC converters in 2026. Compare offline desktop apps, open-source tools, and online converters for smaller audio files for mobile playback and streaming-style delivery.

Jake MangerJune 13

The best MP4 to WAV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for extracting full-quality audio from videos, interviews, lectures, and screen recordings.

Jake MangerJune 13

The best MP4 to WebM converters in 2026. Compare offline desktop apps, open-source tools, and online converters for web publishing, HTML5 video, and smaller browser-friendly exports.

Jake MangerJune 13

The best FLAC to WAV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for editing lossless audio in apps that prefer WAV.

Jake MangerJune 12

The best WAV to OGG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for open web audio, game assets, and smaller voice recordings.

Jake MangerJune 12

The best MP3 to M4A converters in 2026. Compare offline desktop apps, open-source tools, and online converters for Apple devices, podcast workflows, and AAC-based distribution.

Jake MangerJune 12

The best MP3 to WAV converters in 2026. Compare offline desktop apps, open-source tools, and online converters for editing, transcription, audio repair, and tools that expect uncompressed WAV.

Jake MangerJune 11

The best MP3 to FLAC converters in 2026. Compare offline desktop apps, open-source tools, and online converters for archiving MP3 libraries in a lossless container when you need FLAC compatibility.

Jake MangerJune 11

The best WAV to FLAC converters in 2026. Compare offline desktop apps, open-source tools, and online converters for lossless compression, archiving, and keeping audio quality intact.

Jake MangerJune 11

The best WMA to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for modernizing older Windows audio libraries.

Jake MangerJune 10

The best OGG to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for sharing open-format audio with people who need the most compatible option.

Jake MangerJune 10

The best AIFF to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for compressing studio exports and Apple audio files for everyday sharing.

Jake MangerJune 10

The best M4A to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for podcasts, voice notes, music libraries, and devices that prefer MP3.

Jake MangerJune 9

The best FLAC to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning lossless audio into smaller files for phones, cars, and sharing.

Jake MangerJune 9

The best AAC to MP3 converters in 2026. Compare offline desktop apps, open-source tools, and online converters for moving audio between Apple, Android, car stereo, and web playback workflows.

Jake MangerJune 9

The best JPG to AVIF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for compressing web images with a modern high-efficiency format.

Jake MangerJune 8

The best PNG to ICO converters in 2026. Compare offline desktop apps, open-source tools, and online converters for creating Windows icons, favicons, and multi-size desktop assets.

Jake MangerJune 8

The best BMP to JPG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for shrinking legacy bitmap images into a common compressed photo format.

Jake MangerJune 8

The best PNG to SVG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for vectorizing logos, icons, and simple graphics for design workflows.

Jake MangerJune 7

The best RAW to JPG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for sharing camera files quickly without opening a full photo editor.

Jake MangerJune 7

The best AVIF to JPG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for making next-generation images work in older apps and upload forms.

Jake MangerJune 7

The best PNG to PDF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning screenshots, diagrams, and scanned pages into shareable PDFs.

Jake MangerJune 6

The best PDF to PNG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for extracting crisp pages, slides, receipts, and document previews.

Jake MangerJune 6

The best SVG to PNG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning vector artwork into upload-ready raster images.

Jake MangerJune 6

The best HEIC to WebP converters in 2026. Compare offline desktop apps, open-source tools, and online converters for publishing iPhone photos on the web with smaller file sizes.

Jake MangerJune 5

The best TIFF to JPG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for sharing scans and print files with people who need a common photo format.

Jake MangerJune 5

The best JPG to PDF converters in 2026. Compare offline desktop apps, open-source tools, and online converters for combining photos, scans, receipts, and forms into portable PDF documents.

Jake MangerJune 5

The best JPG to WebP converters in 2026. Compare offline desktop apps, open-source tools, and online converters for smaller web images, faster pages, and modern site performance work.

Jake MangerJune 4

The best PNG to WebP converters in 2026. Compare offline desktop apps, open-source tools, and online converters for shrinking screenshots, product images, and site assets without giving up too much quality.

Jake MangerJune 4

The best HEIC to PNG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for turning iPhone photos into editing-friendly PNG files.

Jake MangerJune 4

The best WebP to JPG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for older apps, upload forms, print workflows, and clients who still expect JPEG.

Jake MangerJune 3

The best PNG to JPG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for smaller image files, web uploads, email attachments, and photo sharing.

Jake MangerJune 3

The best JPG to PNG converters in 2026. Compare offline desktop apps, open-source tools, and online converters for editing workflows, screenshots, transparent assets, and apps that expect PNG.

Jake MangerJune 3

Extract every page of a CBR comic as a JPG image. Free desktop, command-line, and web methods for editing, reordering, or sharing single pages.

Jake MangerMay 16

Convert HEIC photos to JPG on Linux. Step-by-step using ImageMagick, libheif tools, GIMP, and the GNOME image viewer. Free and works on Ubuntu, Fedora, and Arch.

Jake MangerMay 15

Extract every page of a CBZ comic as a JPG image. Free desktop, command-line, and web methods for editing, reordering, or sharing single pages.

Jake MangerMay 14

The best OGG to AU converters for 2026. Convert Vorbis OGG audio to Sun AU format for Java applications, legacy Unix systems, and academic toolchains with these free and paid tools.

Jake MangerMay 13

Convert a PDF comic into a CBT (tar-based) file for Unix-friendly comic readers. Free desktop, command-line, and web methods.

Jake MangerMay 12

The best FLV to MP4 converters for 2026. Convert legacy Flash Video (FLV) files to MP4 for modern playback on phones, browsers, and TVs with these free and paid tools.

Jake MangerMay 11

Compress PDF file size for email, web upload, or storage. Free desktop, command-line, and online methods that keep your PDFs sharp and readable.

Jake MangerMay 10

Convert CBT (tar-based) comic archives to CBZ for the most widely supported comic format. Free desktop, command-line, and web methods.

Jake MangerMay 9

The best MKA to MP3 converters for 2026. Convert Matroska Audio (MKA) files to MP3 for universal device playback with these free and paid tools.

Jake MangerMay 8

Convert CBZ comic archives to CBT (tar-based) for readers that prefer the tar format. Free desktop, command-line, and web methods.

Jake MangerMay 7

How to batch convert hundreds or thousands of files at once. Free desktop, command-line, and online tools that handle video, audio, image, and document batches.

Jake MangerMay 6

The best MP4 to OGV converters for 2026. Convert MP4 to Ogg Theora video for HTML5 fallback, Wikipedia uploads, and open-source projects with these free and paid tools.

Jake MangerMay 5

Convert CBR comic archives to PDF for reading on Kindle, iPad, or any device. Free desktop, command-line, and web methods.

Jake MangerMay 4

The best MKV to MP3 converters for 2026. Extract MP3 audio from MKV (Matroska) video files for lectures, music videos, and any audio you need on the go.

Jake MangerMay 3

MP4 vs MKV explained. Compatibility, file size, audio tracks, subtitles, and the right format for streaming, archiving, and sharing in 2026.

Jake MangerMay 2

Convert CBZ comic archives to PDF for reading on Kindle, iPad, or any device. Free desktop, command-line, and web methods.

Jake MangerMay 1

The best MP4 to TS converters for 2026. Convert MP4 to MPEG Transport Stream for HLS streaming, IPTV, broadcast, and media servers using these free and paid tools.

Jake MangerApril 30

Turn any video clip into an animated GIF. Free, local methods that do not upload your video, plus the best tools for editing and trimming first.

Jake MangerApril 29

Convert your CBR comic files to CBZ for better compatibility. Free desktop, command-line, and web methods, plus a video walkthrough.

Jake MangerApril 28

The best video to MP3 converters for 2026. Extract MP3 audio from MP4, MOV, MKV, AVI, WebM and any other video format with these free and paid tools.

Jake MangerApril 27

How to convert a PDF comic or manga into a CBZ file your comic reader can handle. Free desktop, command-line, and web methods, plus a video walkthrough.

Jake MangerApril 26

The best MP4 to MPEG converters for 2026. Convert MP4 video to MPEG-1 or MPEG-2 for DVD authoring, legacy hardware, and broadcast workflows with these free and paid tools.

Jake MangerApril 25

The best MOV to MP4 converters for 2026. Convert QuickTime MOV videos to MP4 for better compatibility using these free and paid tools.

Jake MangerApril 6

The best MP4 to MP3 converters for 2026. Extract audio from MP4 videos and save high-quality MP3 files with these free and paid tools.

Jake MangerApril 5

The best Word to PDF converters for 2026. Convert DOC/DOCX to PDF with clean formatting using these free and paid tools.

Jake MangerApril 4

The best HEIC to JPG converters for 2026. Convert Apple HEIC photos to JPG format with these free and paid tools.

Jake MangerApril 3

The best open source and free file converter apps for 2026. Community-driven tools for video, audio, image, and document conversion.

Jake MangerApril 1

The best batch file converter apps for converting multiple files at once. Save time with bulk conversion tools for video, audio, images, and documents.

Jake MangerMarch 30

The best completely free file converter apps for 2026. No subscriptions, no hidden fees. Convert video, audio, images, and documents for free.

Jake MangerMarch 26

The best ebook converter apps for 2026. Convert EPUB, MOBI, PDF, AZW, and more with these free and paid tools.

Jake MangerMarch 24

The best PDF converter apps for 2026. Convert to and from PDF with these free and paid tools for every platform.

Jake MangerMarch 22

The 18 best WAV to MP3 converters in 2026. Convert WAV to MP3 locally (offline) or online with these free and paid tools for Mac, Windows, and Linux.

Jake MangerMarch 22

The best PDF to Word converters for 2026. Convert PDF to DOCX with accurate formatting using these free and paid tools.

Jake MangerMarch 21

The 12 best online file converters in 2026, plus a quick safety checklist (privacy, retention, malware risks) so you can convert files online without getting burned.

Jake MangerMarch 21

The best document converter apps for 2026. Convert Word, PDF, HTML, Markdown, and more with these free and paid tools.

Jake MangerMarch 20

The best image converter apps for 2026. Convert JPG, PNG, WebP, HEIC, SVG, and more with these free and paid tools.

Jake MangerMarch 18

The best file converter apps for Linux in 2026. Open-source and paid tools for video, audio, image, and document conversion on your Linux machine.

Jake MangerMarch 12

The best file converter apps for Windows in 2026. Free and paid tools for video, audio, image, and document conversion on your PC.

Jake MangerMarch 11

Production Expert named How to Convert its Software Product of the Year 2025. A quick note on why they chose it and what it means for the app.

Jake MangerMarch 8

A viral Reddit privacy audit found hundreds of cookies and third-party domains on popular ‘free’ file converter sites. Here’s what that means and how to convert files locally instead.

Jake MangerMarch 7

Most online converters require uploading your files to someone else’s server. Here’s what happens to your data, the real risks, and safer ways to convert files locally without uploading.

Jake MangerMarch 6

How to Convert now supports AVIF, the modern image format that delivers superior quality at significantly smaller file sizes compared to traditional formats.

Jake MangerMarch 18

The most requested feature is here! Convert multiple files simultaneously while keeping your data private and secure on your device.

Jake MangerMarch 15

Learn how How to Convert is contributing to climate change solutions by donating 1.5% of revenue to carbon removal technologies through Stripe Climate.

Jake MangerMarch 12

My first app failed. I spent 2 years on it. Then I made a $1,000 app in a month.

Jake MangerMarch 9

Join our affiliate program and earn 30% commission on every sale. A great opportunity to earn while helping spread the word about How to Convert.

Jake MangerMarch 6

Stop uploading your files to sketchy websites. Learn how to securely and privately convert files with How to Convert, the all-in-one app for file conversion.

Jake MangerMarch 5

Experience How to Convert's privacy-first file conversion directly in your browser on mobile. No installation required - convert files instantly while keeping your data private.

Jake MangerMarch 5