Compress PDFs without uploading them
Shrink PDFs in your browser without uploading them anywhere. Private, fast, free.
Drop a PDF, or click to browse
Locdone will rebuild it smaller.
Text in the output is no longer selectable — Locdone rebuilds pages as images. Best for scans and image-heavy PDFs.
How Locdone does this
No servers. No uploads. Just your browser's own abilities.
Drop a PDF
Choose a compression level. Locdone reads the file directly from your disk through your browser's File API.
Pages are rebuilt smaller
Locdone renders each page with pdf.js, re-encodes it as a JPEG at your chosen quality, and assembles a new, smaller PDF.
Download the compressed file
The result is ready in your browser. No file ever travelled to a server — watch the Network tab if you want to verify.
Questions
Does this really not upload my PDF?
Correct. To verify: disable your internet connection, drop a PDF, choose compression level, then check DevTools (F12) Network tab — it stays empty. The work happens entirely in your browser.
How much smaller will my file be?
For scanned documents, expect 40–70% reduction at Balanced. Text-only PDFs compress less because text is already efficiently stored.
Is the text still selectable in the compressed PDF?
No. Locdone rebuilds pages as images, so text becomes part of the picture. This is the honest tradeoff for working entirely in the browser without heavy WASM dependencies. A future Pro version will add text-preserving compression.
Which level should I pick?
Balanced suits most uses. Light keeps maximum quality for printing. Strong produces the smallest file, best when emailing scans.
Does this work for scanned documents?
Especially well. Scans are already image-based, so Locdone's approach compresses them aggressively without visible quality loss.
More tools
Every one runs on your device. Nothing is uploaded.