Document scans as images
Compress an image to 200 KB.
Some portals accept JPG but not PDF. 200 KB is exactly where one A4 greyscale scan at 150 DPI fits — marksheet photos, affidavits and certificates submitted as images.
- 100% client-side
- Nothing is uploaded
- No account
- Canvas / WebAssembly on your device
Loading compressor…
DPI to KB: what a 200 KB image scan looks like
| Scan | Typical JPEG size | Fits 200 KB? |
|---|---|---|
| A4 greyscale, 100 DPI | 60–120 KB | Yes, easily |
| A4 greyscale, 150 DPI | 120–190 KB | Yes — the sweet spot |
| A4 colour, 200 DPI | 250–400 KB | No — go greyscale or use 300 KB |
| Portrait photo 600 × 800 | 80–150 KB | Yes, high quality |
Expert trap: scanning at 600 DPI, then compressing
The source beats the compressor. A 600 DPI scan squeezed to 200 KB destroys exactly the text you scanned. Re-scan at 150–200 DPI instead: same cap, far more legible glyphs.
JPG where the portal expects PDF
Check the accepted formats first. If PDF is allowed, the PDF compressor preserves page structure and usually reads better at the same bytes. If the field is image-only, this page is the right one.
Frequently asked questions
Is 200 KB enough for an A4 scan?
Greyscale at 150 DPI, yes. Colour at the same DPI usually is not — that needs the 300 KB preset or a greyscale pass.
Greyscale or colour for marksheets and certificates?
Greyscale keeps every glyph and cuts bytes three to four times. Choose colour only when a seal or stamp carries meaning and the cap allows it.
Why is my 200 KB scan unreadable?
Almost always a 600 DPI source or colour noise. Lower the scan resolution rather than raising the compression.
How should I photograph an affidavit or certificate?
Straight-on against a dark, even background, no shadow across the page, then crop to the paper edges before compressing.
Does re-encoding strip EXIF and GPS?
Yes. Decoding and re-encoding drop camera metadata, including GPS — a useful privacy side effect for document uploads.