DigiLocker-friendly document targets
DigiLocker itself and DigiLocker-linked workflows often involve certificates, ID scans, or proof documents that are larger than needed. The common problem is not just total file size — it is clarity after compression. If you over-compress a certificate, the name, roll number, or document number becomes hard to read. If you under-compress it, the upload stalls or gets rejected by the connected portal. A middle target around 150-250KB per image is usually a safe working range for document images.
| Document Type | Safe Target | Format | Why |
|---|---|---|---|
| Marksheet / certificate photo | 150KB - 250KB | JPEG | Keeps names and grades readable |
| Aadhaar / ID front or back | 100KB - 200KB | JPEG | Usually enough for text and QR visibility |
| Passport-size proof photo | 50KB - 100KB | JPEG | Small, clear, fast upload |
| Screenshot of issued document | 150KB - 300KB | JPEG | Preserves app-generated text and logos |
How to keep certificate text readable after compression
Documents compress differently from portrait photos. A certificate has sharp black text, seals, logos, and often fine-line table borders. To keep these elements readable, use a moderate target and avoid aggressive downscaling unless the original image is extremely large. If your scan is 2MB or 3MB, first try a 200KB target. If the text still looks crisp, use that version. If the document has tiny print or multiple languages, raise the target slightly instead of forcing it under 100KB.
🔗 Related Tools on Aero Tools
How to compress a DigiLocker document (3 steps)
Upload the document image above. For the best result, use a cropped scan or a straight photo taken in good lighting with the entire document visible.
The tool is pre-set to a 200KB JPEG target. Click Compress, then check whether names, dates, seals, and document numbers are still easy to read.
Download the result and upload it to DigiLocker or the portal that requested your supporting document. If the text is still too small, compress again with a slightly higher target.
Frequently asked questions
What if my certificate becomes blurry after compression?
Increase the target size slightly instead of forcing the file under a very small limit. Documents need more clarity than photos because users and portals must read text, roll numbers, and issue dates accurately.
Should I use JPEG or PNG for DigiLocker uploads?
JPEG is usually better for smaller file size. PNG is only worth keeping if the document has very sharp graphics and the portal accepts the larger output. For most certificates and ID photos, JPEG is the better upload format.
Can I compress Aadhaar or PAN scans for DigiLocker-linked use?
Yes. ID scans usually compress well to the 100-200KB range while staying readable. Check that the name, DOB, and any QR or document number area still looks clear before uploading.