Logo
Tooooolbox
100% private

MP4 to MP3

Pull the audio track out of a video and download it as an MP3. Drop your MP4 (or MOV, WebM, MKV), pick a bitrate, and get the audio only. Everything runs in your browser — your video is never uploaded.

Compress MP3MP4 to MP3Video to GIFCompress GIFTrim videoTrim audio
Related tools

Free Image Compressor

Compress any image, 100% private, no upload.

Crop & Rotate Image

Drag the corners to crop, rotate or flip your photo, and watch the result update live.

Blur or Pixelate an Image

Hide a face, a license plate, a name or any sensitive detail before sharing a photo.

Remove Image Background

Cut out the background of a photo automatically — no clicks, no green screen.

Compress PDF

Drop a PDF that's too heavy to email or upload.

Convert Images to PDF

Drop your JPG, PNG or WebP images and merge them into one PDF in seconds.

PDF to JPG / PNG

Drop a PDF and turn every page into a JPG or PNG image.

Merge PDF Files

Combine several PDFs into a single document in seconds.

Split PDF

Extract the pages you need from a PDF, or split a document into one file per page.

Organize PDF Pages

Reorder, rotate and remove pages from a PDF using page thumbnails, then download the rebuilt document.

Watermark PDF & Add Page Numbers

Stamp a text watermark across every page of a PDF, and optionally add page numbers.

Compress Image to 100KB

Need to reduce a photo to exactly 100KB? Drag your image below, set the quality slider until the output size drops under 100KB, then download instantly.

Compress Image to 200KB

Many upload forms cap attachments at 200KB.

Compress Image to 50KB

50KB is a very tight target — usually required for passport-size photos, ID documents or certain Indian government portals.

Compress JPEG Online

JPEG is the most common photo format on the web, but fresh camera shots can easily weigh 5–10MB.

Compress PNG Online

PNG files are losslessly encoded, so they tend to be much larger than JPEGs.

HEIC to JPG Converter

iPhone and iPad photos are saved as HEIC by default — a format many apps and websites don't support.

Compress Images for Web

Page speed is a Google ranking factor.

Compress Image for Instagram

Instagram resamples every photo you upload, often adding visible artefacts.

Compress Image for WhatsApp

WhatsApp automatically compresses photos you send, sometimes drastically.

Compress Image for Email

Most email providers cap attachments at 10–25MB, but large images slow down inboxes and often get blocked by corporate mail filters.

Resize Image Online

Need a photo at a specific pixel dimension? Set the max width/height field to your target size and drop your images.

Convert PNG to JPG Online

PNG files are often 3–5× larger than equivalent JPEGs.

Convert Image to AVIF

AVIF is the most efficient mainstream image format — typically 30–50% smaller than JPEG and smaller than WebP at the same quality, with transparency and HDR support.

Convert Image to ICO (Favicon)

Need a favicon.
Frequently asked questions

No. The audio is extracted in your browser with FFmpeg in WebAssembly. Your video never leaves your device — no upload, no account.

MP4, MOV, WebM, MKV and most common containers. Only the audio track is decoded and re-encoded to MP3.

Audio extraction is fast since the video frames are discarded. The first run downloads the engine once; after that it's quick, even for long videos.

Yes. Pick 128 kbps for music videos, or lower for podcasts and talks to get a smaller file.