If you have ever seen "file size should be between 20 KB and 50 KB" at the last step of an application, you know how frustrating it is. Phone cameras produce photos of 3 to 8 MB, while many Indian portals for recruitment, entrance exams, scholarships, banking and document uploads expect a photo of roughly 20 to 50 KB, a signature of about 10 to 20 KB and certificates somewhere between 100 and 500 KB. The exact numbers change from one form to the next, so always read the official notification. The method below works for all of them.

1. Prepare the original properly

  • Photo: stand in front of a plain light wall, face the light, and take a clear picture with your phone. Crop so only your face and shoulders remain.
  • Signature: sign with a dark pen on plain white paper, photograph it in daylight and crop tightly around the signature.
  • Certificates: use a scanner app or a flat, well-lit photo so text stays readable.

2. Check the required dimensions

Some forms also state pixel dimensions, for example around 200 x 230 pixels for a photo and a wide, short rectangle for a signature. Resize with your phone's editor before compressing. Smaller dimensions are the single biggest lever on file size.

3. Reduce the file size

Open the File Size Reducer, add your photo and move the slider until the preview shows a size below the limit. Aim 10 percent under the maximum: a 50 KB limit is safer with a 44 to 47 KB file, because some portals count a kilobyte as 1000 bytes and others as 1024. Photos taken on an iPhone are in HEIC format; the reducer handles them and saves a JPG that every portal accepts.

4. Make sure it is the right file type

Most forms ask for JPG or JPEG. If the portal wants a PDF for documents, reduce your scan as JPG first and then turn it into a PDF with the JPG to PDF converter. If you have several pages, combine them with the PDF Merger.

5. Check before you upload

  • Right-click the file (or long-press on a phone) and look at its size in KB.
  • Open the image to confirm your face and signature are still clearly readable.
  • Name the file simply, without spaces or special characters, such as photo.jpg and signature.jpg.

Common reasons for rejection

The file is slightly over the limit; the extension says .jpeg while the form expects .jpg; the signature has a coloured or shadowed background; the photo has a dark background or a hat; or the upload was a screenshot of another file. Fixing these takes minutes, but do not wait until the last day of the application window, when portals are slow.

TinyFileHub is an independent tool and is not affiliated with any exam body, recruiter, bank or government website. Always follow the instructions in the official notification.

Extra tips that save a rejection

  • Use the same photograph across applications so identity checks match.
  • Wear plain clothes that contrast with a light background and avoid white shirts on white walls.
  • Do not edit brightness heavily; verifiers compare faces to documents.
  • Write the signature in the same style you use on official documents.
  • Keep a folder on your phone named "applications" with the finished files and a note of each portal's rules.