Private file utilities, since 2026
The private, in-browser way to compress, convert and clean files.
Government forms. Job uploads. Spreadsheet cleanup. FileKnack runs entirely on your device, with no uploads, no accounts, and no watermarks. Hit exact size targets with precision.
Drop your PDF here
or click to browse (up to 200 MB)
Precision file utilities that just work.
Each tool was built around a specific job; hit exactly 100 KB, merge spreadsheets with mismatched headers, compress PDFs without losing readability.
Browser-based from the first byte.
Your files never reach a server.
Most "free online tools" upload your file to their backend, then upsell a subscription to download the result. FileKnack does neither. Compression, parsing, and generation all run in JavaScript inside your browser.
No server-side processing
Your file is read by your browser only. No request ever carries its contents.
Works offline after first load
Once a tool page is open, disconnect your network. It still runs.
Zero accounts, zero metadata
No sign-up, no tracking IDs, no stored file history. EXIF stripped on image output.
You drop a file
Reads the file via browser FileReader API
JavaScript compresses it locally
Canvas + Web Workers. No network request issued.
You download the result
Output is a Blob URL served by your own browser.
Hit the exact size you need. In seconds. In your browser.
Whether you need a 20 KB passport photo for a visa form or a merged CSV for a client, FileKnack takes you from drop to download without touching a server.