Compress PDF to 100 KB
Try to compress a PDF below 100 KB locally for strict upload portals. The shared Ghostscript engine performs at most four validated passes and clearly reports when 100 KB is unrealistic rather than silently destroying readability.
- Processed locally in your browser
- No watermark
- No sign-up
- Works offline
Processed locally in your browser. Compression runs in a dedicated Ghostscript WebAssembly worker. No file is uploaded, and target sizes are best-effort—not guaranteed.
Choose a PDF or drop it here
One PDF · recommended maximum on this device: 150.0 MB
How it works
- 1Open a PDF and review its likely compressibility.
- 2The target starts at 100 KB and can be adjusted.
- 3A bounded sequence of increasingly aggressive image settings runs locally.
- 4Download the smallest validated result and check whether the target was reached.
Your privacy
This tool runs entirely inside your browser using JavaScript and Web Workers. Your document is never uploaded to any server — you can even disconnect from the internet and keep working once the page has loaded.
Frequently asked questions
▸Why might 100 KB be impossible?
Every PDF needs structural overhead, fonts and page content. Long or image-heavy documents may become unreadable before reaching 100 KB, so PaperZero stops after a bounded retry budget.