How do I compress a PDF to 25MB?

Upload your PDF, click the 25MB preset (or enter a custom size), and click Compress. ExactPDF binary-search compressor finds the highest quality that fits under 25MB — all in your browser, no upload.

Why do I need a PDF under 25MB?

25MB matches Gmail and Outlook default attachment caps. Useful for compressing high-resolution scanned reports, design portfolios, and engineering drawings just enough to email.

Why does Gmail block PDFs over 25MB?

Gmail enforces a 25MB max for attachments to limit per-message storage cost and protect users from accidentally sending huge files. Anything larger gets auto-uploaded to Drive instead.

Is my PDF safe during compression?

Yes. ExactPDF compresses your PDF entirely in your browser using JavaScript and WebAssembly. The file never leaves your device — no upload, no server, no logs. You can verify in your browser DevTools → Network tab.

What if my PDF cannot be compressed to 25MB?

If the PDF contains many high-resolution images or complex graphics, 25MB may not be reachable while keeping it readable. The tool returns the smallest achievable size and reports the actual result so you can decide whether to retry.

Does this tool add a watermark?

No watermark, ever. ExactPDF is 100% free with no signup. Output PDFs contain the same content as the input — just smaller.

Does this work offline?

Yes. Once the page loads, you can compress PDFs without an internet connection — all processing runs locally via WebAssembly.

Compress PDF to 25MB

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Compress PDF to 25MB

Set a strict target size and keep the best readable result. 100% private, no upload.

🔒 Files never leave your device

Choose target size

100 KB

200 KB

300 KB

500 KB

1 MB

2 MB

5 MB

Custom target

Target: 24.4 MB

Other exact-size pages

Drop PDF to compress

Target: 24.4 MB. Files stay on this device.

Select PDF

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Instant

Your files never leave your device

Max file size: 150MB

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