CosmiPDF - Purrfect PDF Tools
Zero Server. Zero Cost.
100% browser-side processing. Your files never leave your device. No signup, no limits, just kittens.
100% Private
Files never leave your browser. Zero uploads. Zero risks.
Blazing Fast
Local processing means no upload or download wait times.
Free Forever
No subscriptions, no file limits, no hidden costs.
Everything you need, none of the risk.
Join thousands of privacy-conscious users who have switched to browser-side PDF processing.
Most Popular Tools
Our users' favorites, optimized for speed and privacy.
Merge PDFs
Process your PDFs 100% locally in your browser.
Compress PDF
Process your PDFs 100% locally in your browser.
Split PDF
Process your PDFs 100% locally in your browser.
Image → PDF
Process your PDFs 100% locally in your browser.
Redact text
Process your PDFs 100% locally in your browser.
Fill PDF form
Process your PDFs 100% locally in your browser.
How it works
1. Drop File
Pick your tool and drop your files. Everything stays in your browser.
2. Mochi Processes
Your browser processes the file using JavaScript — same as how Gmail works offline. No data ever leaves your tab.
3. Download
Get your "purrfect" result instantly. No upload wait times.
Maximum Privacy
Other sites upload your PDFs to their servers. We process everything in your browser using JavaScript. Your data stays private.
No Limits
Merge, compress, or convert as many files as you want. There are no daily limits or paywalls.
Fast & Light
No waiting for uploads or downloads. The processing speed depends on your device, not your internet connection.