PDF Compressor
Compress PDF free online — reduce PDF file size for email or upload without losing readability. Runs entirely in your browser. No server upload required.
This free PDF compressor reduces the file size of any PDF directly in your browser without uploading it to any server. Upload your PDF, choose a compression level, and download the smaller file — useful when you need to email a large document, upload to a portal with a file size limit, or reduce storage usage.
PDF compression works by downsampling embedded images and removing unnecessary metadata. Text-only PDFs are already small and may not compress significantly. PDFs containing high-resolution photos, scanned pages, or large embedded graphics benefit most from compression and can typically be reduced by 50–80% with minimal visible quality loss.
This tool offers multiple quality presets — from light compression that preserves near-original quality to aggressive compression for the smallest possible file. Choose based on the intended use: documents for printing need higher quality than documents shared for digital review.
Your file never leaves your device. All compression is performed client-side in the browser using JavaScript, which means no upload wait time, no server-imposed file size limit, and no privacy risk. Sensitive contracts, financial documents, and personnel files can be compressed safely.
If the compressed result is too large, try a more aggressive compression setting. If the quality is unacceptable, use a lighter setting. For PDFs where image quality is critical, consider compressing the images before creating the PDF using the Image Compressor tool on this site.
Frequently Asked Questions
- How do I compress a PDF for free?
Upload your PDF, select a compression level, and click compress. The smaller PDF downloads to your device instantly. No account, no server upload, and no file size limit — processing happens entirely in your browser.
- Is there a free PDF compressor with no file size limit?
Yes. This PDF compressor is free and processes files in your browser, so there is no server-imposed file size limit. Very large files may take a few seconds to process depending on your device.
- How much can I reduce a PDF file size?
PDFs containing images can often be reduced by 50–80% with minimal quality loss. Text-only PDFs are already highly compressed and may only reduce by 5–20%. The amount of compression depends on the content and the quality setting you choose.
- Will compressing a PDF reduce the text quality?
No. Text in PDFs is vector-based and is not affected by image compression. Only embedded raster images are downsampled. Text remains sharp and fully readable after compression at any quality level.
- Is my PDF safe to compress with this tool?
Yes. Your file never leaves your device. All processing is client-side. Sensitive documents including contracts, financial records, and medical documents are safe to process.
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