Compress any image to 15KB or less automatically. Ideal for exam portal signature uploads, legacy government systems and applications with a strict 15KB file size limit.
Drop any JPEG or PNG image onto the tool. For best results at 15KB, use an image already sized to your portal's required dimensions — typically 200×230 pixels for photos or 140×60 pixels for signatures. The tool displays original size and dimensions immediately.
The binary search algorithm finds the highest JPEG quality that produces a file at or under 15KB. No manual adjustment needed. For properly-sized small photos and signatures, the quality is typically acceptable for document submission.
Click Download to save the result. The output filename includes a "-compressed" suffix. If quality is lower than expected, resize your source image to smaller dimensions and try again for better results.
The 15KB limit appears on some Indian competitive exam and government portals, particularly for signature image uploads where the photo limit may be 20–50KB but signatures are capped at 10–15KB. It also appears on some older banking and insurance application portals, and certain state-level PSC exam registration systems.
At 15KB vs 20KB, the quality difference is noticeable for complex photographic images but minimal for simple content like signatures and ID photos with plain backgrounds. For most exam portal use cases, both sizes are adequate for their intended purpose — document submission and identity verification.
Yes — a 140×60 pixel or 200×70 pixel signature image compresses very efficiently to 15KB, typically achieving quality 80–90 because signatures have simple black-on-white content with limited colour variation. 15KB is more than enough for a crisp, readable signature at standard exam portal dimensions.
No — this tool only adjusts JPEG compression quality to hit the 15KB target. Pixel dimensions remain unchanged. This is important for portals that check both file size and dimensions. Resize separately if needed, then compress.
If the rejection reason is file size exceeding 15KB, yes — compress your signature using this tool and re-upload. Also ensure the format is JPEG (not PNG), dimensions match the portal's requirements, and the image is in colour or greyscale as specified. Some portals also check that the image is not purely white.
Yes — the tool runs in Safari on iOS. You can upload photos from your camera roll, compress them to 15KB, and the downloaded file goes to the Files app. From there you can upload it to your exam portal's web form.
