Compress PDF Online

Compress a PDF in your browser: what to expect and when it won't shrink

This tool loads your PDF in your browser, rewrites it with a more compact internal structure, and offers the result for download as comprimido.pdf. The file is processed locally and is not uploaded. It reports the original size, the new size and the percentage change.

Important limit. It optimizes the file's structure; it does not re-compress images inside the PDF. Documents made mostly of text and many small objects, such as exports from word processors, may shrink. Scans and photo-heavy files are mostly image data, so savings can be small or even zero, and in rare cases the output may be slightly larger. Always compare the numbers shown before using the new file.

When you need a bigger reduction

• Shrink the pictures before building the PDF with the image compressor, then use JPG to PDF.
• Remove pages you do not need with the PDF splitter, or send big documents in parts.
• When scanning, choose a lower resolution; 150 to 200 dpi is usually readable for plain documents.

Common situations in the US

• Email attachments: Gmail allows up to 25 MB per message.
• Online applications, immigration, benefits and school portals often cap upload size per file, so check the stated limit.
• Insurance and loan documents may contain sensitive data. Local processing helps, but still send only what is needed.

Mistakes

• Overwriting the original. Keep it, in case the compressed version misses something.
• Expecting a password-protected or signed PDF to stay valid after re-saving; check the result carefully.

Other PDF tools: merge PDFs, sign a PDF and extract text from a PDF.