Local processing
PDF contents are not sent to a conversion server.
Browser-local PDF compression
Compress PDF
Scanned PDF too large for email or an upload portal? Shrink image-heavy documents locally with three easy DPI settings—free, no upload. Check the final size before sending.
Browser-local processing
No PDF uploadCompressed in your browserUp to 50 pages
Original
Compressed
Change
The same scan at three compression settings
These are recorded examples, not promised results for your files. Download an input, use the settings below, then compare your saved output.
The input is a two-page, raster-only fictional scan with small text and a drawn handwriting sample. It contains no personal data or cryptographic signature. All three outputs were downloaded from Compress PDF using its named presets.
Download source PDF · 1,983,300 B · 2 pages
| Setting | Output | Reduction from source |
|---|---|---|
| 144 DPI | 451,178 B · 2 pages | 77.3% |
| 110 DPI | 184,019 B · 2 pages | 90.7% |
| 90 DPI | 108,958 B · 2 pages | 94.5% |
The crops below show the same first-page region at the same display scale. Open or download them to inspect small text. Lower DPI may lose legibility; file-size savings vary with the input.
This tool rasterizes pages. Selectable text, searchable text layers, interactive forms, links, annotations and valid digital signatures are not preserved as their original PDF objects. It does not add OCR. Do not use a re-rendered copy where the original signature or editable form is required.
Source, environment and reproduction details
Recorded 2026-10-19 · Chromium 140.0.7339.16 · Windows · 1280 × 960 · site version 865d4e4.
Photo: Fronalpstock big.jpg — Hannes Röst, CC BY-SA 3.0. Resized and re-encoded; all photographic derivatives in this sample keep that license. Original fictional screenshots, transparent graphics and PDFs are available under CC0. No source includes customer files.
- Download an input linked above and keep the original.
- Use this tool with the listed settings. Keep the tab open, then save the actual output.
- Compare saved bytes, dimensions and detail. Browser/encoder versions may produce different bytes; these are recorded observations, not universal compression ratios.
Download settings, exact byte counts and SHA-256 checksums (JSON) · Asset licenses
Privacy-first office workflow
Shrink bulky scanned PDFs for email and upload portals
Large scanned receipts, photo-based forms or image-heavy PDFs? Try Balanced 144 DPI, Smaller 110 DPI or Maximum 90 DPI to make a more convenient sharing copy—processed locally in your browser.
Compare the output size before downloading. This mode turns every page into an image, so keep the original if selectable text, editable forms, links or digital signatures matter. Size reduction varies by file.
Three levels
Choose from balanced quality through maximum compression.
Visible results
See original size, output size, and the percentage change before downloading.
What does this compressor change?
This version renders each PDF page to a JPEG image and builds a new PDF using the original page dimensions. It can reduce many scans and image-heavy PDFs, but it rasterizes text and vector content.
Keep the original when selectable text, links, forms, or vector graphics matter. A future structural optimization mode can be added separately so it is clearly distinguished from this page re-encoding mode.
Frequently asked questions
Are PDFs uploaded?
No. Reading, rendering, JPEG encoding, and creation of the new PDF all happen in the current browser.
Why is text no longer selectable?
This version compresses by re-rendering each page, so text, vector graphics, links, and searchable text become page images.
Which level should I use?
Start with Balanced. If the file is still too large, try Smaller or Maximum.
Why can the output sometimes be larger?
A PDF that is already highly optimized or mostly simple text may not become smaller after raster re-encoding.
Are password-protected PDFs supported?
Not yet. PDFs that require a password are not supported in this version.
Can I compress scanned PDFs for email or government upload portals?
Yes. For scans and image-heavy PDFs, choose Balanced (144 DPI), Smaller (110 DPI), or Maximum (90 DPI). The output is created in your browser; check its size and readability before uploading.
Can you guarantee my PDF will be under 2 MB?
The compressor can make many scanned PDFs smaller, but there is no fixed 2 MB target or guaranteed reduction. Results depend on the pages, images and original encoding.