100% Private
Files are zipped locally in your browser and never uploaded to any server.
File Compressor
Bundle any files into a single ZIP archive — fast, free, and entirely in your browser.
Drop files here or browse
Select multiple files to compress into one ZIP archive
100% client-side — your files never leave this device.
Why compress files with TechTools?
Many files, one ZIP
Bundle any number of files of any type into a single downloadable archive.
Adjustable level
Choose Fastest, Balanced or Smallest to trade speed against archive size.
Free & instant
No signup, no install, no size limits — download your ZIP right away.
Frequently asked questions
How do I compress files into a ZIP online?
Drop your files onto the upload area (or click to browse), pick a compression level, and click Create ZIP archive. Your ZIP is built instantly in the browser and ready to download.
Are my files uploaded to a server?
No. Compression runs 100% in your browser using JSZip — your files never leave your device, so it's completely private.
Is the ZIP compressor free?
Yes, it's completely free with no registration, no watermarks and no file-count limits.
Which compression level should I choose?
Fastest (level 1) is quickest, Smallest (level 9) squeezes the archive the most, and Balanced (level 6) is the recommended middle ground for everyday use.
Is there a file size limit?
There's no server-side limit because nothing is uploaded. The practical ceiling is your device's available memory, since the whole archive is built in the browser.
Can I compress many files at once?
Yes — select or drop as many files as you like and they're combined into one single .zip archive you can share in one link or email.