100 kb photo — GST, CTET and Kerala CEE all stop here
At 100 KB you can still keep a proper sharp passport crop — GST, CTET and Kerala CEE all cap out at this same ceiling.
JPG, PNG, WebP · up to 50 files at once · nothing is uploaded
100 KB photo specification
| Requirement | Value |
|---|---|
| GST registration | Maximum 100 KB per photograph, for each promoter, partner and the authorised signatory |
| CTET | Photograph 10-100 KB, JPG/JPEG, 3.5 x 4.5 cm |
| Kerala CEE | Photograph 1-100 KB, jpg, 150 px width x 200 px height, light background |
| UPSC signature | 20-100 KB on the upsconline uploading sheet |
| NTA signature (NEET, JEE Main) | 10-100 KB, JPG/JPEG |
| Practical pixel size | About 600 x 800 px still fits inside 100 KB at good quality |
Source: Manual — Registration Application, Normal Taxpayer (GST portal) (undated help page (notes a 27 December 2018 change); read September 2026). checked on 2026-09-06. The user manual allows 'PDF or JPEG' for the photograph while the GST document checklist says JPG only. Both agree on the 100 KB ceiling.
A budget where quality stops being a fight
Below 50 KB every kilobyte is a compromise. At 100 KB a passport-style crop can hold real detail: skin tone stays smooth, hair does not smear, and text in a scanned signature stays crisp. The GST registration manual caps each photograph at 100 KB, the CTET bulletin allows 10-100 KB, and Kerala CEE allows 1-100 KB at 150 x 200 px.
Aim for 70, not 99
Portals differ in how they measure a file, and a 99.6 KB export occasionally reads as over the limit after the server re-saves it. Leaving 10-30% headroom costs you nothing visually and removes that class of failure entirely.
Read the non-numeric rules too
Kerala CEE is a good example of why size alone is not compliance: the same sheet says the photograph must be taken in a professional studio and that a photo taken by mobile phone or tablet is not accepted. GST, by contrast, publishes no dimension or background rule at all — just the 100 KB ceiling and a warning that blank uploads are rejected. Match the wording of your own portal, not the number alone.
How it works
- Crop the photo to the shape your portal asks for, or 3.5 x 4.5 cm if none is given.
- Resize to somewhere between 300 x 400 and 600 x 800 px.
- Export as JPEG at around 80% quality.
- Check the file lands between 60 and 90 KB, leaving headroom under the limit.
- For GST, repeat once per promoter, partner and authorised signatory.
- Keep the export — 100 KB files also satisfy most 200 KB portals without rework.