Compress a PDF aggressively
Maximum compression — 90% reduction via JBIG2 + JPEG2000 + Flate font-subsetting. Built for IRS 1040 e-file, USCIS I-130, PACER 32 MB cap. Text preserved. 100% WebAssembly, beats Adobe $19.…
How it works
Upload your PDF
Drag your file into the upload zone, or browse from your disk.
1-click action
The tool processes your PDF instantly, locally whenever possible.
Download the result
Get your processed PDF, share by email or save to cloud storage.
Why choose iFillPDF
90% reduction
JBIG2 (B&W scans, 5-10x denser than CCITT G4 + lossy mode at 100x), JPEG2000 quality 50 for color photos, DCTDecode q=40 for product/headshot images, Flate font-subsetting (drop unused glyphs from embedded TTF/OTF).…
Email-ready
Designed to fit Gmail, Outlook, Apple Mail attachment limits.
Quality preview
Compare before/after on the first page before committing.
Local processing
Files never leave your computer — processed in your browser.
Technical details
Maximum compression mode for very heavy scan-heavy PDFs — up to 90% reduction via JBIG2 monochrome + JPEG2000 quality 50 + DCTDecode q=40 + Flate font-subsetting. Text + vector content preserved at full fidelity, raster images compressed hard. Built for IRS e-file 1040 attachments (PDF/A-2b export option), USCIS Form I-130 attorney bundles, court FRCP Rule 26 disclosures hitting PACER 32 MB upload cap. 100% WebAssembly in-browser, no Adobe $19.99/mo, no Smallpdf $12/mo.
Go further with lifetime access
E-signature proof log, business templates, no watermark. $8.99, one payment, for life — no subscription.
Frequently asked questions
Is it really free?+
Yes — 100% free and unlimited. No account, no credit card; the free version adds a watermark, which a paid plan removes.
Is my data safe?+
Yes — files never leave your computer — processed in your browser. All processing happens locally on your machine.
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