UtilityBaseProductivity Tools
PDF Compressor
Shrink PDF file size in your browser — three presets, no upload, no limits.
Updated July 8, 2026
How to use the pdf compressor
- 1Pick a preset — Balanced is the right first try.
- 2Drop your PDF onto the tool.
- 3Watch pages compress and check the before/after sizes.
- 4Download the compressed copy — and keep your original.
Common uses
- Getting a scanned document under an email attachment limit
- Shrinking a phone-scanned form for a portal with a 2–10 MB cap
- Reducing a design-heavy deck or brochure for sharing
- Compressing sensitive statements without uploading them anywhere
Frequently asked questions
How does it decide how much to compress?
You do, with three presets: Light re-renders at higher resolution and JPEG quality for documents where appearance matters; Balanced suits most email and portal limits; Strong prioritizes hitting stubborn size caps. Each page is rasterized and re-encoded, which is the same fundamental approach commercial compressors use on their servers.
What's the catch compared to Adobe or Smallpdf?
The honest trade-off: this method rasterizes pages, so text stops being selectable and searchable in the compressed copy — keep your original. In exchange, there's no upload (your documents stay on your machine), no file-size caps, no daily limits, and no 'Strong compression is a Pro feature' upsell.
Why didn't my PDF get smaller?
It was probably already efficient. Text-only PDFs are tiny by construction — a 50-page text contract can be 300 KB — and rebuilding one as page images can even enlarge it, which the tool flags. Compression pays off on scanned documents, phone-photographed pages, and design-heavy files, where images dominate the bytes.
How do I hit a specific limit like 2 MB or 10 MB?
Start with Balanced and check the result; step to Strong if needed. Per-page size scales with the preset's resolution and JPEG quality, so a 30-page scan at Strong lands far under what Light produces. If even Strong misses an aggressive cap, splitting the PDF and sending in parts (our PDF splitter) is the pragmatic fallback.
About this tool
The PDF compressor reduces file size the way the big sites do — re-rendering pages and re-encoding their images at an optimized resolution and quality — except it happens entirely in your browser with pdf.js and pdf-lib, so statements, contracts, and scans never touch a server. Three honest presets trade quality for size, with the before/after numbers shown. It's most effective exactly where PDFs get bloated: scans and image-heavy files often shrink 60–90%, while already-lean text PDFs may not shrink at all (and the tool says so instead of pretending).
Like most tools on UtilityBase, the pdf compressor runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more productivity tools here.
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