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audiobook.tools

Free · Private · Nothing uploaded

The audiobook studio in your browser.

Convert, split, check and narrate audiobooks with professional tools that run entirely on your device. No uploads, no sign-up, no catch.

Browse the shelf Inspect an audiobook
Tools
43
Uploaded
0 bytes
Price
Free

How it works

Your files stay home.

Every tool is built on technology inside your browser, so even a 20-hour audiobook is processed at the speed of your own computer.

  1. 01

    Drop your files

    MP3, M4B, M4A, FLAC, WAV, EPUB and more. Drop a single file or a whole folder.

  2. 02

    Processed on your device

    WebAssembly, Web Audio and WebGPU do the work locally. Nothing crosses the network.

  3. 03

    Download, or keep going

    Save the result, or send it to the next tool from your Workbench without picking it again.

The shelf

Pick a book. Every tool is one.

43 tools are open today and 0 more are being bound. Glowing spines are ready to use.

ConvertEvery format, every app
  • MP3 → M4B
  • M4B → MP3
  • Merge
  • Compressor
  • Speed Changer
  • Audio → M4B
ChaptersFind your place
  • Chapter Splitter
  • Inspector
  • Chapter Editor
  • Metadata
  • Silence Split
  • Chapter Export
StudioPass ACX the first time
  • ACX Checker
  • ACX Mastering
  • Noise Floor
  • Room Tone
  • Sample Maker
  • Credits
  • Cover Check
  • Spec Checker
  • Recorder
  • Pronunciations
  • Clean-up
CalculatorsKnow the numbers
  • Length
  • Speed
  • Narrator Cost
  • Finish Date
  • Royalties
  • Royalty Share
  • Reading Goal
  • Manuscript
AIFree, private, on-device
  • EPUB → Audio
  • Text → Audio
  • PDF → Audio
  • Kokoro TTS
  • Transcriber
  • Chapter AI
  • Script Cleaner
ListenPress play
  • Volume Boost
  • Player
  • Credit Value
  • Subscriptions
  • Commute

Made for

Everyone who loves a good listen.

Collectors

Turn folders of MP3s into one tidy, chaptered M4B. Fix covers, tags and chapters.

Explore

Narrators

Check RMS, peaks and noise floor before you upload, and pass ACX the first time.

Explore

Authors

Know your audiobook’s length, cost and royalties before you commission it.

Explore

Listeners

See how long a book takes at 1.5x, plan your reading year and play your own files.

Explore

Questions

Good to know.

Are these audiobook tools really free?

Yes. Every tool is free with no sign-up and no limits on how often you use it. The site is supported by ads.

Do my files get uploaded anywhere?

No. Your audio, text and books are processed inside your own browser using WebAssembly, the Web Audio API and WebGPU. Nothing is sent to a server, which also means large files are never slowed down by an upload.

Can I convert Audible AAX files?

No. Audible AAX and AAXC files are protected by DRM, and removing DRM is illegal in many countries. Our tools work with DRM-free audiobooks, such as those from Libro.fm, Downpour, LibriVox, your own recordings or CDs you have ripped.

Which browsers are supported?

The latest versions of Chrome, Edge, Firefox and Safari on desktop and mobile. Large files work best on a desktop computer, and the AI tools run fastest in Chrome or Edge with WebGPU.