Shrink any file, right in your browser
Free, privacy-first compression for images, PDFs, video and audio. Your files are processed entirely on your device — nothing is ever uploaded.
Every tool you need
Compress and convert any file
A focused tool for each format — each one runs locally, with clear before-and-after size feedback.
Image tools
View allImage Compressor
Compress JPEG, PNG, WebP, AVIF and GIF images privately in your browser.
JPEG Compressor
Shrink JPG/JPEG photos with MozJPEG — adjustable quality.
PNG Compressor
Optimize PNGs losslessly with OxiPNG, or go smaller lossy.
WebP Compressor & Converter
Compress WebP or convert images to modern WebP format.
AVIF Compressor & Converter
Create tiny AVIF images or recompress existing ones.
GIF Compressor
Reduce GIF size, or convert to far smaller WebP / MP4.
HEIC Compressor & Converter
Convert iPhone HEIC/HEIF photos to JPEG, WebP or AVIF and shrink them.
Image Converter
Convert between JPEG, PNG, WebP and AVIF in your browser.
Image Resizer
Resize images by pixels or percentage with no upload.
Video tools
View allWhy FileShrinking
Compression that respects your privacy
Most online compressors upload your files to their servers. We took a different approach — and it turns out to be better in almost every way.
100% private
Files are read and compressed on your device. Nothing is ever uploaded to a server — there's no server to upload to.
Fast & offline-capable
No upload or download round-trip. Compression runs locally with WebAssembly, so it works even after your connection drops.
Free, no sign-up
Every tool is free with no account, no watermark, and no email required. Use it as much as you like.
No file-count limits
Batch-process many files at once and download them all in a single zip. Limited only by your device's memory.
How it works
Three steps, zero uploads
From file to smaller file in seconds — without your data ever leaving your device.
- 1
Add your files
Drag and drop, browse, or paste from your clipboard. Queue as many as you like — they stay on your device.
- 2
Choose your settings
Pick a preset or fine-tune quality. See the projected savings update before you commit.
- 3
Download instantly
Grab each compressed file, or download everything as a zip. No waiting on an upload or a server queue.
Fully open source
Don’t just take our word for it. FileShrinking is 100% open source under the MIT license — the entire codebase is public, so anyone can verify that your files never leave your device.
Auditable
Read the code that runs in your browser. No hidden uploads, no tracking of your files.
MIT licensed
Free to use, fork, and build on — for personal or commercial projects.
Self-hostable
Clone it and run your own private instance anywhere you like.
Frequently asked questions
Ready to shrink your files?
No account, no upload, no catch. Pick a tool and try it now.