Online application forms — exams, passports, visas, job portals, college admissions — often reject photos over 100KB, 50KB or even 20KB. Phone photos are usually 3–8MB. This guide shows how to hit any size limit quickly while keeping the photo clear.
The two levers: pixels and quality
File size depends on how many pixels the image has and how much compression is applied. A 4000 × 3000 phone photo has 12 million pixels — far more than a form needs. Shrinking the dimensions first is the single biggest saving.
Most forms display photos at a few hundred pixels. Open the image resizer, choose Pixels, and set a width:
| Target size |
Suggested width |
| Under 200KB |
1200 px |
| Under 100KB |
800 px |
| Under 50KB |
600 px |
| Under 20KB |
350–400 px |
If the form specifies exact dimensions (for example 3.5 × 4.5 cm or 200 × 230 px), use those instead.
Step 2: Compress
Drop the resized photo into the image compressor. It compresses immediately and shows the new size. If you're still over the limit, lower Quality a step at a time and click Re-apply settings. For portraits, 60–75% quality usually looks perfectly fine.
Tip: choose JPG as the format. Most forms accept only JPG/JPEG.
Step 3: Check the result
- Face clearly visible, no blocky artefacts?
- File size under the limit (shown on each file)?
- Correct format (.jpg)?
Signature under 20KB
Signatures are simple, so they compress extremely well. Photograph your signature on white paper, resize to about 400 px wide, then compress at 60% JPG. You'll usually land between 8KB and 15KB.
Doing many at once
Need photos for a whole class or team? Drop all of them into both tools — resizing and compression work in bulk and download as a ZIP.
Everything runs in your browser, so personal photos and ID images are never uploaded.