Compress a PDF — 100% in your browser

Shrink PDF files without uploading them anywhere. Your document is processed entirely on your own device — nothing is sent to a server. No account, no email, no file-size limit.

🔒 Nothing uploaded — open DevTools and check No account · no email No file-size limit Single files free · batch $9.99 once Works on Chrome, Edge, Safari, Firefox
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Drag & drop PDF files here, or

Preparing the offline compression engine…

Everything runs locally. The first visit downloads the compression engine once (a few MB), then works even offline.

Why compress a PDF offline?

Most "compress PDF" websites make you upload your file to their server, shrink it there, and send it back. For a holiday photo that is fine. For a signed contract, a medical record, a tax return, or a bank statement, it means handing a stranger's server a copy of a sensitive document — which may be logged, cached, or retained. This tool does the opposite: the PDF is compressed by code running inside your browser tab. It never touches the network. You can confirm that yourself — open your browser's DevTools, watch the Network panel, and compress a file: not a single byte leaves your machine.

What gets smaller

Private by design

There is no upload endpoint, no account system, and no server-side storage — the site is a set of static files plus an in-browser engine. Because the work happens locally, there is no file-size limit imposed by an upload quota, and it keeps working if your connection drops after the first load.

FAQ

Is my file really not uploaded?
Correct. Compression runs in your browser via WebAssembly. Open DevTools → Network and watch: compressing a file generates zero network requests. The site works offline after the first load, which wouldn't be possible if it needed a server.
How much smaller will my PDF get?
It depends on the file. Scanned or image-heavy PDFs often shrink 50–90%. PDFs that are already mostly text and well-optimized may shrink only a little — there is simply less to remove.
Will the text stay selectable?
Yes. The engine optimizes and recompresses embedded images and removes redundant data while preserving the document's text and structure.
Is there a size limit?
No upload limit, because there is no upload. The practical limit is your device's memory for very large files.
Does it cost anything?
Compressing a single PDF is free, forever. Batch mode — compress many PDFs at once and download them as one ZIP — is a one-time $9.99 unlock (no subscription, no account beyond your email). Competitors charge $9–15 per month; this is once.