MP4 to MP3 Converter

Convert MP4 to MP3 free, in your browser. No upload, no account, no ads. Batch convert up to 100 files at once.

JUST FUCKING CONVERT IT

Free file converter. 100% in your browser. No upload. No account. No ads. No tracking.

IMAGE CONVERTER

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Convert to:

Hover an option for a quick explanation.

DROP FILES OR FOLDER

HEIC · JPG · PNG · WebP · GIF · BMP · AVIF

…or paste an image (Ctrl/Cmd + V)

CONVERTED FILES

Free File Converter — No Upload, No Account, No Bullshit

Just Fucking Convert It is a free, browser-based file converter. Drop your files, pick an output format, and download the result. Your files never leave your device — everything runs locally in your browser using JavaScript and WebAssembly. No upload, no server, no sign-up, no ads, no tracking, no watermarks.

Image Conversion

Convert HEIC, HEIF, JPG, PNG, WebP, GIF, BMP, and AVIF to PNG, JPG, or WebP. Quality slider (60–100%), optional max-dimension resize, EXIF strip, and auto-orientation. Drag in a whole folder and batch convert up to 100 files at once.

Audio & Video Conversion

Convert MP3, WAV, AIFF, M4A, OGG, FLAC, MP4, and MOV to MP3 or WAV. Pick MP3 bitrate from 96 to 320 kbps, or WAV bit depth (16-bit CD quality or 24-bit studio). All decoding and encoding happens client-side — no server, no wait time, no upload.

PDF Tools

Convert each PDF page to PNG or JPG at your chosen DPI. Merge multiple PDFs into one document. Split a PDF into one file per page. Everything runs in your browser using pdf-lib and PDF.js.

Common questions

Is it free?
Yes. No subscription, no trial, no payment ever. Just convert your files.
Do my files get uploaded anywhere?
No. All conversion runs inside your browser. Your files never touch a server — they stay on your device and are completely private.
Does it work offline?
Yes. After the first visit, the app installs a Service Worker that caches everything locally. You can convert files with your Wi-Fi turned off.
Do I need to create an account?
No account, no sign-up, no email. Open the page, drop your files, done.
Are there ads or watermarks on converted files?
No ads, no watermarks, no hidden limits. Your converted files are clean.
How many files can I convert at once?
Up to 100 files per batch (20 for PDFs). Drop a whole folder and the app auto-detects and groups file types.
What formats are supported?
Images: HEIC, HEIF, JPG, PNG, WebP, GIF, BMP, AVIF. Audio/video: MP3, WAV, AIFF, M4A, OGG, FLAC, MP4, MOV. Documents: PDF (to images, merge, split).
How do I convert a HEIC photo to JPG?
Select the Images tab, click JPG, drop your HEIC files, click Convert. Done in seconds.
Can I control quality and file size?
Yes. Conversion options live right inside the converter card and change based on the format you pick — JPG/WebP quality, MP3 bitrate, WAV bit depth, PDF render DPI, plus an optional max-dimension resize. Hover any option for a quick one-line explanation.
How do I switch between light and dark mode?
Click the sun / moon icon at the top right of the page. It cycles through Auto (follows your system), Dark, then Light. Your choice is remembered between visits.

How to convert MP4 to MP3

  1. Open the converter. Open justfuckingconvertit.com — no sign-up, no install, nothing to download.
  2. Drop your MP4 file. Drag your MP4 file (or a whole folder of them) onto the drop zone, or click to browse. You can also paste an image with Ctrl/Cmd + V.
  3. Pick MP3 as the output. The page auto-selects MP3 for you. You can switch formats at any time from the format buttons.
  4. Click Convert. Hit Convert. Conversion runs entirely in your browser using JavaScript and WebAssembly — your files never get uploaded anywhere.
  5. Download the MP3 file(s). Single files download automatically. For batches, hit "Download ZIP" to grab everything at once.

Why use Just Fucking Convert It for MP4 → MP3?