File editing and optimizing tools and guides

Compress, crop, trim, sign and resize files, or pull out what is inside them.

Compress files

Audio compressor: make the file smallerRe-encode MP3, WAV, FLAC, Ogg or AAC to a smaller MP3 at a bitrate you choose, and see the measured bytes before and after.
Compress GIF to a size you pickGive it the limit you are up against. It finds the settings, and tells you which ones it had to spend.
Compress PDF filesRe-encode the JPEG pictures inside your PDF, then keep the result only if the whole file is smaller. Runs in your browser. No upload, no account.
Compress image to an exact sizeName the size you need. It works backwards to get there, and shows you the arithmetic.
Compress video to a measured file sizeSet a byte ceiling, see the bitrate math, and download only after the browser measures the finished MP4.

Edit files

Create & extract files

How-to guides

How to reduce file sizePhotos, video, PDFs and documents each shrink for different reasons. Here is what actually works for each, and where the sensible floor is.

Editing, compressing and extracting, without an upload

This section is for the files you want to keep in the same format but change: a PDF with a page too many, a video that runs long, a photo that is too heavy to email, a document that needs a signature. Converting a file into a different format is a separate job with its own section, file converter tools, and the two link to each other where a task crosses the line.

The tools are grouped by what they do to the file. Compression makes images, GIFs, PDFs, audio and video smaller while keeping them in the format they already have. Editing covers cropping, trimming, rotating, resizing, splitting, merging, signing and password protection. The last group creates new files from scratch, such as a recording or a waveform, or extracts what is already inside one, such as the images in a Word document, the frames of a video or the contents of a ZIP archive.

All of it happens on your own device. Your file is read by this browser tab and written back out by it, and nothing is uploaded, queued or stored anywhere else. Large files are warned about before the work starts rather than refused, because memory on your machine, not an arbitrary limit on ours, is what decides how big a job can be.