Compress PDF to 500KB online.
The 500KB limit is pre-filled so you can upload, compress and immediately see whether the target was reached.
Reduce a PDF to around 500KB
A 500KB limit gives more room than very small targets such as 100KB or 200KB, so many short documents can be reduced while staying readable. SizeFix checks the output after each compression pass and stops as soon as the file is at or below the requested size.
If the document is still too large, the compressor progressively lowers image quality and page-render resolution. This is especially useful for scanned forms, application documents, receipts and PDFs built from phone photos. Text-heavy PDFs may already be compact, while image-heavy files usually offer more room for reduction.
Keep important text readable
Do not compress more than necessary. If your destination accepts 500KB, a 480KB readable file is better than a 150KB file with blurry signatures or small print. Always open the downloaded result and check critical information before uploading it.
If the file cannot reach 500KB
Consider splitting the PDF, deleting duplicate or blank pages, converting colour scans to simpler images before rebuilding the PDF, or using a lower-resolution scan. SizeFix reports the best result it produced instead of silently claiming that an unmet target succeeded.
500KB PDF FAQs
Can I change the target after opening this page?
Yes. The page starts at 500KB, but you can type a different maximum size before compressing.
Will my PDF stay the same number of pages?
Yes. The compressor preserves the page count while reducing the page image data.
What if my PDF is already below 500KB?
You may not need to compress it at all. Check the original file size first and avoid unnecessary quality loss.