Tools Compress PDF
Compress PDF — without uploading it anywhere
Pick a quality level and PDF Guard shrinks the file right here in your browser — no upload, no queue, no waiting on someone else's server. Your file never leaves this tab.
Drop your PDF here
It opens right here in the tab — 0 bytes uploaded.
Free. No sign-up. No daily limits.
Opened locally — 0 bytes uploaded
How to compress a PDF
Three steps, all inside your browser tab. Works with Wi-Fi off.
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Open your PDF
Drop it above or click Choose PDF. The file renders right here — nothing is sent anywhere, so there's no upload wait, even for huge files.
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Pick a quality level
Choose Balanced, Strong, or Maximum compression. PDF Guard shows the new file size before you commit, so you can dial it in until it fits your email or upload limit.
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Download the smaller file
Save the compressed copy next to your original. The original on your disk stays untouched — if the result is too aggressive, just pick a gentler level and run it again.
Smaller files, quality you control
Most of a heavy PDF's weight is images — scans, photos, screenshots. PDF Guard recompresses and downsamples those images at the quality level you choose, and strips duplicate fonts and dead objects along the way. Text and vector graphics are never rasterized, so your document stays sharp and searchable.
- You choose the trade-off — see the new size before you download
- Text stays selectable and crisp — only images are recompressed
- Speed depends on your device, not a server queue — and there's no per-day cap
Upload-based compressors
Uploading… then waiting in the queue…
Your file sits on a server — and free plans often cap you at a couple of files
PDF Guard
Compressed locally — nothing uploaded
No upload, no queue, no cap — compress as many files as you like
On upload sites, much of the "compression time" is really upload time. Local compression skips that step entirely.
Privacy you can check, not just believe
We don't ask for trust. The architecture makes uploading impossible — and you can verify that in under a minute.
01
Turn off Wi-Fi
Open a PDF, then go offline. Compress, preview, download — everything keeps working, because the app is already in your tab.
02
Watch the network tab
Open DevTools → Network and compress a file. You'll see 0 requests containing your document.
03
Nothing to breach
No upload queue, no server copy, no "deleted after 2 hours" promise. There is no server that ever holds your file.
Frequently asked questions
Will compressing reduce the quality of my PDF?
Only as much as you allow. Text and vector graphics are never touched — they stay sharp at any zoom. Compression works on the images inside the file, at the quality level you pick. Choose Balanced for documents you'll print, Strong for email, Maximum when size matters most. You see the resulting size before you download, and your original file stays untouched on disk.
How much smaller will my file get?
It depends on what's inside. Scanned documents and image-heavy reports shrink the most, because photos recompress well. A text-only PDF that's already optimized won't shrink much — there's simply less to remove. That's why PDF Guard shows you the actual new size before you save, instead of promising a fixed percentage.
Is there a daily limit or file cap?
No daily limit — compress as many files as you like, as often as you like. Because compression runs on your own device, there's no server bill forcing us to meter you. The free tier covers documents up to 20 pages; Pro ($10/yr) removes the page cap. Free. No sign-up. No daily limits.
Why is there no upload progress bar?
Because there's no upload. The file opens directly in your browser tab and is compressed by your own device, so speed depends on your computer — not your connection or a server queue. Verify it yourself: turn off Wi-Fi after opening a file, or watch DevTools → Network show zero requests containing your document.
More tools, same rule: local only
Your file is already open — chaining tools is free, because nothing re-uploads.