File Compressor — Compress Files Online Free
Compress file size in your browser. Drop any image, PDF, SVG, GIF, or ZIP and filecompressor.app shrinks it instantly — no upload, no sign-up, no limits. Files never leave your device.
Drop your file here, or click to browse
Files are processed in your browser — nothing is uploaded.
A free, private way to compress file size
What is a file compressor
A file compressor is a tool that reduces the size of a file so it takes up less storage, uploads faster, and fits inside email and messaging limits. filecompressor.app is a free online file compressor that works entirely in your browser. When you drop a file in, it auto-detects the type and applies the best compressor — images, PDFs, SVGs, GIFs, and ZIP archives are all supported.
Unlike upload-based tools, your files never leave your device. The compression runs locally using WebAssembly and Web Workers, which makes it private, secure, and free of size limits. Whether you need to compress file size for an email attachment, a website, or a Discord upload, the homepage handles it without sending you to another page.
Private, free, and fast file compression
Why use filecompressor.app
Files never leave your browser
Every compression runs locally with WebAssembly. Nothing is uploaded, so your files stay completely private.
Unlimited and free
No sign-up, no watermarks, no file limits. Compress as many files as you want, forever free.
Fast with Web Workers
Heavy compression runs in background workers, so the UI stays smooth and results come back fast.
Private and secure
Because files never get uploaded, there is no server breach risk. Sensitive documents stay on your device.
Pick the right compressor for your file
Compress by file type
The homepage auto-detects your file, or jump straight to a dedicated tool.
Ready to compress your file?
No sign-up, no upload, no limits. Drop a file at the top of the page and download a smaller version in seconds.
FAQ
Common questions about the file compressor.
Frequently Asked Questions
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