Compress PDF files free in your browser. Hit an exact target size like 1MB or 100KB, keep text sharp, and no watermark. Files are never uploaded to a server.
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Most online compressors upload your document to somebody else's server and keep a copy while it processes. This one does not: the compression engine runs inside your browser tab, so the file is read from your disk and written back to your disk without ever being transmitted.
| Free | Streams8K | SmallPDF | Adobe Acrobat |
|---|---|---|---|
| Price | Free forever | Free / $15 mo Pro | $31.99 mo |
| Files per day | Unlimited | 2 free | 1 free |
| Account needed | No | Yes for more | Yes |
| Your file uploaded | No | Yes | Yes |
| Watermark | No | No | No |
| Compress to an exact size | Yes | Preset buckets | Preset buckets |
Comparison reflects the free public tiers of each service, checked September 2026. Paid plans and limits change - always verify on the provider's own pricing page.
Background reading, plus tools that pair well with this one.
Four simple steps, under ten seconds.
Everything you need to know.
Shrink PDF file size in your browser. It is part of the Streams8K free AI toolbox - no sign-up, no watermark, unlimited use.
Yes. Compress PDF is 100% free with unlimited uses: no account, no credit card, no hidden limits and no watermark on your downloads.
No. Compress PDF runs right in your browser - just open this page and start. It works on any modern browser (Chrome, Edge, Firefox, Safari) on desktop or mobile.
No. Compress PDF processes your files locally, inside your browser - they never get uploaded to a server, so nothing is stored or tracked.
Yes - because it runs in the browser it works on Android, iPhone, Windows and Mac alike.
Follow the four steps above - most jobs take under ten seconds from start to download.
No. The downloaded file is clean - we never stamp a logo, banner or "compressed by" footer onto it.
No. Compression runs inside your browser using the pdf-lib engine, so your document is never transmitted, stored or seen by us. That is why it is safe for contracts, payslips and medical records.
No. There is no sign-up, no email capture and no free-tier countdown. Open the page, compress, download.
Yes - free and unlimited. There is no quota, no daily cap and no paid tier, because your own device does the work and we pay nothing per file.
A text-only document usually lands between 20 KB and 150 KB. Pages that are mostly photos have a higher floor, since the image data has to fit somewhere. If you need to go smaller, splitting the file works better than more compression.
No. Text is stored as vectors or small bitmaps and stays sharp at any sensible setting. Only images lose detail, so keep the target at 150 DPI or higher if the file will be printed.
Set 1 MB as your target in the tool above. Because image resolution dominates file size, an exact target is normally easy to hit unless the document is already minimal.