Compress PDF to 500KB Online Free — No Quality Loss
Compress any PDF to under 500KB for email, sharing or upload limits. Free browser-based compressor — no signup, no upload, text stays legible.
Many email providers, LMS platforms and document-sharing sites limit attachments to 500KB or less. A single exported report or scanned document can easily exceed this limit.
This tool compresses your PDF to sit just under the 500KB mark while keeping text and images sharp. Everything runs in your browser — your file never leaves your device.
Compress your PDF to under 500KB — free
Identity proof — keep it legible, Aadhaar watermark visible.
Scanned documents are rasterised and re-encoded to land safely under the portal's KB limit. If the source is already under the limit it is passed through unchanged. Always keep a copy of the original file.
Upload a PDF to preview the compressed result.
Exam PDF Compressor runs entirely in your browser — no document ever leaves your device. Multi-page and batch files are supported; batch downloads come as a ZIP.
500KB compression target
- Target: under 500KB PDF output.
- Best for: email attachments, LMS uploads, document sharing.
- High-quality output — text, images and diagrams stay sharp.
How to compress a PDF to 500KB
- 1
Upload the PDF
Drag your large PDF into the tool.
- 2
Set target to 500KB
Enter 500 in the target KB field.
- 3
Process
The compressor re-rasterizes pages and tunes quality until the file sits under 500KB.
- 4
Preview and download
Check the readability score and page preview, then download the compressed PDF.
Pro tips
- 500KB is a safe target for most email and sharing use cases — good balance of quality and size.
- If you need even smaller, try 200KB or 100KB targets.
- Preview the compressed PDF zoomed-in to check that diagrams and charts remain clear.
Frequently asked questions
Will compression to 500KB affect image quality?
At 500KB the quality loss is minimal for most documents. Text stays razor-sharp and images retain good detail. Only very image-heavy PDFs may show visible compression.
Can I compress a multi-page report to 500KB?
Yes — the tool compresses the entire document so the total output stays under 500KB. Very long reports (50+ pages) may need lower per-page quality.
What if my PDF is already under 500KB?
The tool will detect this and skip unnecessary recompression. You can still run it to verify the output size.
Is my PDF uploaded anywhere?
No — compression runs entirely in your browser using PDF.js and canvas, so your PDF never leaves your computer.