The file compressor that
never uploads your files.
A free online file compressor for images, PDFs, documents, audio and code, running entirely inside your own tab. Drop one file or thirty and we route you to the right tool automatically.
or browse your device. Batches welcome, we detect every format
A file compressor in three steps, none of them a server.
Drop your files
We read the extension and the magic bytes, so a mislabelled file still routes correctly. Batches are fine.
We route you
You land on the right compressor with everything already loaded. A mix of formats, or a format that is not live yet, goes to Create ZIP instead of a dead end.
Compare and save
Drag the preview divider to check the result, tune the settings, then save locally, one file or the whole queue.
Your files never travel.
Every compressor here runs inside your tab. There is no upload endpoint to breach, no retention policy to read, and no queue to wait in. Pull the plug on your wifi and it still works.
- No upload endpoint exists, so there is nothing to intercept.
- Works with your network disconnected after page load.
- Nothing to sign up for, nothing stored, nothing to delete later.
- No accounts, no watermarks, no daily limits.
- Analytics count page views and compressions, never file names or contents.
One file compressor, every common format.
Live tools are linked. Anything marked soon is on the roadmap. We'd rather ship honest labels than an inflated count.
Instant. Re-encoded natively, nothing to download first.
Create ZIP packs files or a folder. Compress ZIP rebuilds an existing archive. This is not an unzipper.
Same in-browser, nothing-uploaded approach, built specifically for video. We'd rather send you to the specialists.
Questions
How is this file compressor free?
Compression runs on your own machine, so there is no per file cost for us to pass on. No account, no daily limit and no watermark.
How can compression work without a server?
Your browser already has everything needed to read and rewrite these formats, because it does it every time you open a photo or a PDF. We use what is on your device rather than sending your file to ours.
Is this actually private, or just marketing?
There is no upload route in the code. You can watch the network tab: after the page loads, no request carries your file, because your file never becomes a request.
Can I compress a batch of files?
Yes. Drop as many as you like. Files of the same format queue on that compressor. A mix of formats, or a format that is not live yet, goes to Create ZIP, so nothing is silently skipped.
What about very large files?
The ceiling is your device memory, not our infrastructure. Compression runs in the background, so even a heavy file leaves the page responsive.
Why is video missing?
Because vidshift.io already does it properly, in the browser, with the same privacy model. Duplicating a tool that good would help nobody, so we send you there instead.
Does it cost anything?
No. Compression runs on your machine, so there is no per-file cost for us to pass on.