Shrink PDF files up to 90% smaller. Choose your compression level for the perfect balance of size and quality.
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Big PDFs are slow to email, get rejected by upload forms, and eat through mobile data. Compressing a PDF rewrites its internal structure to remove redundancy and pack streams more efficiently, so the file gets smaller without losing pages, text, or formatting.
This tool uses pdf-lib in your browser, so there is no file-size cap from a server, no waiting in a queue, and no uploaded copy left behind.
Drag your file into the upload area. We read it locally and show the original size and page count.
Low for archival quality, Medium for everyday use, High when you need the smallest possible file for email or upload.
Hit Compress & Download. We show the new size and exact reduction percentage so you know if you need to go more aggressive.
Drop your PDF into the uploader, pick Low, Medium, or High compression, then click Compress & Download. Low keeps quality untouched while still rewriting the file structure; Medium balances size and quality; High enables object-stream packing for the smallest output.
Text-heavy PDFs typically shrink 10–30% because text is already compact. PDFs made from scanned images or with embedded photos can shrink 50–90% on the High setting. After compression we show the exact reduction percentage so you know what you got.
No. Compression runs entirely in your browser with pdf-lib. The file never leaves your device, which is why there is no file-size limit, no signup, and no watermark.
If the original was already well-optimized (modern Word/Google Docs exports, for instance), there is little redundancy to remove. Try the High setting, and if the file is mostly scanned images, also rerun the source through our Image Compressor before exporting to PDF.
Low and Medium are lossless for text and vector content. High rewrites object streams more aggressively but still preserves all pages, fonts, and layout — your document looks and prints identically.
Not directly. Remove the password in your PDF reader first (File → Print → Save as PDF in most readers), then run the unprotected copy through this tool.