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Compress PDF to 500KB Online
Use this PDF size reducer to try to compress a PDF to 500KB for an upload requirement. The tool tests progressively stronger compression and reports whether the result fits. Some documents cannot reach this size while keeping their content.
Up to 20MB · Target: 500,000 bytes · Processed on our server
More room for multipage documents
A 500KB allowance gives a document more space for scans and illustrations than a 200KB target. The tool tries medium compression first to avoid unnecessary quality loss, then tests stronger settings only if the output remains above 500,000 bytes.
Compare the output, not just a percentage
A large percentage reduction can still exceed a form's limit. This tool compares actual output bytes with the selected target. If compression makes the file larger, it retains the smaller original. Downloaded results need a visual check, especially for small text in scans. The strongest setting can remove annotations; retain your original.
A few things worth knowing
Can every PDF be compressed to 500KB?
No. Page count, embedded images, fonts and existing compression affect the result. If the smallest tested file exceeds 500000 bytes, the tool says the target was not reached.
Does the tool delete pages or perform OCR?
No. It compresses the PDF with the existing server compression service. It does not remove pages, convert scans into editable text or guarantee that digital signatures remain valid.