PDF Compressor
Shrink PDFs right in your browser
Free forever — no sign-up, nothing uploaded. Files never leave your device.
Illustrative preview, not an active tool
PDF Compressor
Shrink PDFs right in your browser
Choose one PDF
Up to 100 MiB, processed locally
Choose PDFdocument.pdf
1.2 MB
Compression level
Lossy image compression. Text stays text; savings vary.
100% private
Nothing is uploaded — everything runs in your browser.
Free forever
No account or payment required.
No sign-up
Open the tool and start using it right away.
Local processing
Processing time depends on your input and device.
About this tool
Compress one PDF up to 100 MiB locally with three lossy image presets. Text is preserved; output is never larger than the original.
PDF Compressor processes one PDF up to 100 MiB locally in a JavaScript worker, without uploading the document or using WebAssembly. Light, Balanced, and Strong presets use lossy JPEG recompression and may downsize supported embedded images. Text, fonts, page layout, and metadata are preserved; pages are not rasterized.
Unsupported images are left unchanged. Savings depend on the document, so text-heavy or already optimized PDFs may not shrink. If the output would be equal in size or larger, the tool returns your original PDF unchanged. There is no target-size guarantee. Encrypted PDFs and documents with populated digital signatures are rejected. Compression is not metadata removal or document sanitization.
Key features
Everything you get with PDF Compressor — no premium upsell.
Light, Balanced, and Strong lossy image-compression presets
Local JavaScript worker processing for one PDF up to 100 MiB
Preserves text and metadata; skips unsupported images
Returns the original PDF if no smaller output is produced
Compare output size and image counts, then download or adjust compression
How to use PDF Compressor
Follow the steps below to use the tool.
- 1
Choose Your PDF
Open the tool and choose or drop one non-empty PDF no larger than 100 MiB. Use an unencrypted, unsigned copy you are authorized to edit.
- 2
Choose Compression Level
Choose Light for less image-quality loss, Balanced for a middle setting, or Strong for more aggressive image compression. All three presets are lossy.
- 3
Compress the File
Click Compress PDF to process supported images locally. Processing time depends on the document and device; you can cancel while it runs.
- 4
Review and Download
Check the sizes and counts of optimized and unchanged images, then download. If no smaller output was produced, the download is your original PDF. Use Adjust compression to try another preset, and inspect the downloaded PDF before sharing.
Still free, still private — your files never leave your device.
Launch PDF CompressorFrequently asked questions
Quick answers before you launch the tool.
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