Compress · free & private
Make files dramatically smaller
Shrink videos, images, audio and PDFs by up to 90% with smart quality controls — privately, right in your browser.
Compress
Compression tools
14 tools
Compress MP4, MOV, WEBM, AVI and MKV videos by up to 90% with CRF quality control. Free and unlimited. Powered by WebAssembly in your browser.
Reduce MP4 file size with adjustable quality and resolution. No upload. Compression happens on your own device.
Shrink large MOV files from iPhone or editing software. Free, private, runs in your browser.
Compress WEBM videos with quality and resolution controls. 100% client-side and free.
Compress JPEG photos by up to 90% while keeping visual quality. Free, unlimited, and 100% private. Runs in your browser.
Shrink PNG files with smart palette reduction and re-encoding. 100% client-side. Files never leave your device.
Compress WEBP images with adjustable quality, right in your browser. Free and private.
Compress AVIF images to even smaller sizes with tunable quality. Runs entirely in your browser.
Shrink animated GIFs by lowering frame rate, dimensions and colors. Runs in your browser. No upload.
Reduce PDF file size by re-rendering pages at a lower resolution and JPEG quality. Free, unlimited, 100% client-side.
Reduce MP3 file size by re-encoding at a lower bitrate. Free and 100% client-side.
Compress bulky WAV files to a fraction of their size. Runs locally in your browser. No uploads.
Compress any audio file (MP3, WAV, OGG, M4A, FLAC…) with tunable bitrate. Free and private.
Compress PNG, JPEG, WEBP and AVIF images by up to 90% while keeping visual quality. Free, unlimited, and 100% private. Runs in your browser.
How it works
- 01Drop your file
Add a video, image, audio file or PDF — as large as your device can handle.
- 02Choose a quality target
Use the quality slider or resolution controls to trade size against fidelity.
- 03Save the smaller file
Compression runs locally. Compare the before/after size and download the result.
Why file compressor on AZ Tooling?
Big files are a tax on everything: uploads, shares, storage, attachments. AZ Tooling's compressors re-encode your files with modern codecs and sensible quality targets, typically cutting size by 50–90% with no visible difference.
Unlike server-based compressors, your files are never uploaded anywhere. The compression engine runs on your own device, so even confidential documents and personal videos stay completely private.
Frequently asked questions
How much smaller will my file get?
It depends on the source, but most files compress by 50–90%. Videos and photos straight from a camera see the biggest wins because they're encoded for editing, not sharing.
Will compression reduce quality?
You control the trade-off with the quality slider. The default targets are chosen to be visually lossless for typical viewing — most people can't tell the difference.
Is it safe to compress private files here?
Yes. Compression happens entirely in your browser via WebAssembly. Nothing is uploaded, so confidential documents and personal media never leave your device.
Which files can I compress?
Video (MP4, MOV, WEBM, MKV), images (JPEG, PNG, WEBP, AVIF, GIF), audio (MP3, WAV) and PDF documents — each with format-specific optimizations.
Explore more
Video, audio, images, documents, fonts, CAD and more — 380+ conversion pairs, all processed privately on your own device.
Remove backgrounds, enhance photos, cut video and audio, and let on-device AI do the heavy lifting — no uploads, ever.
Merge, split, sign, protect, convert and organize PDFs — a complete PDF suite that never sees your documents.
Dedicated workspaces for PDF, images, video and audio, all designed to run on your device.