100% client-side, nothing ever leaves your browser
Compress a PDF Online
Reduce PDF file size by recompressing embedded images and optimizing the file structure — with honest before/after numbers, not a fake percentage. Everything runs locally in your browser.
Drag & drop a PDF here, or click to browse
One PDF file at a time
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— · — pages
Your PDF has been compressed
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No meaningful reduction was possible
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- Original
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- Result
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- Saved
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How PDF compression works here
Sadevz Compress PDF looks for embedded JPEG images inside your document, decodes each one on a canvas, and re-encodes it at a lower quality and, at higher compression levels, a smaller resolution. Text and vector graphics are copied through byte-for-byte and never touched.
Upload your PDF
The file is read locally and its embedded images are located without altering anything yet.
Choose a level
Pick High Quality, Balanced, or Maximum Compression depending on how much you're willing to trade image sharpness for file size.
Get honest results
The tool compares the real before/after size and tells you plainly if a meaningful reduction wasn't possible, instead of showing a misleading number.
Privacy note: your file is processed locally in your browser and is not uploaded to Sadevz.
Common uses
Email attachment limits
Many mail providers cap attachments around 20-25MB. Compressing a large, image-heavy PDF can bring it under that limit.
Faster uploads to portals
Application forms and submission portals often enforce their own size caps — a smaller file uploads faster and clears those limits more reliably.
Photo-heavy reports
Reports exported with many embedded photos can balloon in size. Recompressing those images can shrink the file substantially without losing the text.
Archiving and storage
Smaller files take up less space when archiving large batches of scanned or exported documents.
Frequently asked questions
How does this PDF compressor actually reduce file size?
It recompresses embedded JPEG images at a lower quality and, for higher compression levels, reduces their resolution, then rebuilds the PDF's internal structure more efficiently. Text and vector graphics are left completely untouched.
Will this always make my PDF smaller?
No, and this tool will tell you honestly if it can't. PDFs that are mostly text, already well-optimized, or use image formats this tool doesn't recompress may see little or no reduction. We never report a fake compression percentage.
Will compression make my text blurry or hard to read?
No. Text and vector content are copied through untouched at every compression level — only embedded raster images are recompressed, and only text-free image content is affected.
Which compression level should I use?
High Quality keeps images close to their original resolution and quality. Balanced is a good default for everyday sharing. Maximum Compression reduces image resolution and quality the most, best for cases where file size matters more than image sharpness.
Is my PDF uploaded to a server?
No. Every step, including image recompression, happens locally in your browser using the canvas API. Your file is never uploaded to Sadevz or anywhere else.
Why didn't my PDF get smaller at all?
This usually means the PDF has little or no recompressible image content — for example a text-only document, or one using image formats (like PNG-style or scanned-fax encoded images) that this browser-based tool doesn't recompress to avoid any risk of visual corruption.
Can I compress a password-protected PDF?
Not directly. Password-protected or encrypted PDFs can't be read by the in-browser engine. Remove the password from the file first, then compress it normally.
More tools
Additional utilities from the same toolkit. Curious how much this actually saves? See the PDF Compression Benchmark →