For a photo/scan of your certificate, use the tool below: it keeps the document's dimensions and compresses it under the KB you set (200 KB is preset). For a PDF, use Compress PDF.
⚡ Certificate resizer — compress to your KB limit● 100% private · in your browser
Common size limits
| Form asks for | Use |
|---|---|
| JPG under 100 KB | Resize image to 100 KB |
| JPG under 200 KB | Resize image to 200 KB |
| JPG under 500 KB | Resize image to 500 KB |
| PDF under 100 / 200 / 500 KB | 100 KB · 200 KB · 500 KB |
| Photo of a document → PDF | JPG to PDF, then compress |
Scanning tips
- Place the certificate flat on a table in daylight and photograph from directly above.
- Crop away the table so only the document is visible.
- Check that marks, names and stamps are readable after compressing — zoom in on the preview.
How to resize a certificate for an online form
- Photograph or scan your certificate.
- Upload it in the tool and crop to the page edges.
- Keep or change the KB limit (200 KB preset).
- Process, check readability, and download.
FAQs
What size should a certificate be for an online form?
It depends on the portal — commonly 100 KB to 500 KB, as JPG or PDF. Always follow your notification.
Should I upload a JPG or a PDF?
Upload whatever the form asks for. If it accepts both, a PDF is better for multi-page documents; a JPG is fine for a single page.
Are my files uploaded to a server?
No. The tool runs entirely in your browser using JavaScript — your files never leave your phone or computer, so they stay private.