Compress an image to 50 KB
Get a photo under 50 KB for job portals, exam forms and ID uploads, with the search steps shown and the achieved size stated exactly.
- Runs in your browser
- Files are never uploaded
- Free, no account
1 KB = 1024 bytes, the same arithmetic your operating system uses.
Only kicks in when quality 5 still overshoots.
The most common form limit there is
50 KB shows up everywhere: job applications, university admissions, visa portals, bank KYC forms and exam registrations. It is tight enough that a phone photo will never pass unedited — a modern camera file is 3–8 MB, sixty to a hundred and sixty times over — and generous enough that a well-cropped portrait still looks respectable.
What 50 KB buys you
| Subject | Comfortable dimensions | Typical quality chosen |
|---|---|---|
| Headshot, plain background | 600 × 800 px | 75–85 |
| Document or certificate scan | 1000 px wide | 70–80 |
| Simple product photo | 800 px wide | 70–80 |
| Busy outdoor scene | 500 × 700 px | 55–70 |
| Group photo with faces to stay recognisable | 700 px wide, crop tightly | 60–75 |
When the form says “between 20 KB and 50 KB”
Aim at 50, not somewhere in the middle. Set the target to 50 KB and read the achieved size in the result card; the search always returns the largest passing file, which is also the sharpest. If the result comes out well under 20 KB — which happens with a small, plain source image — you are being penalised by an unnecessarily small original, so go back and use a larger one rather than trying to inflate the file.
Reading the search
Expand “Show the search” in the result and you get the full working: each encode, the quality it used, and whether the byte count fitted. That is the whole algorithm laid bare — try 92, then binary-search the range, keep the best passer. It is worth a look the first time, because it also shows you how sharply size falls off with quality for your particular image, which tells you whether you have room to spare or are right at the edge.
Dimensions are usually specified too
Forms that cap the file size almost always cap the pixel size as well — 200 × 230 px is a classic pairing with a 20–50 KB limit. Put the required width into the width cap field before you press compress: the resize happens first, and the quality search then works inside the dimensions the form wants rather than producing a file that fits the bytes but fails the pixel check.
Signature scans
A signature is mostly white with a thin dark line, which is the easiest thing in the world to compress. Two tips: scan or photograph it against plain white paper in even light, and consider PNG output — a clean signature can drop under 20 KB losslessly, with none of the grey mush JPEG puts around thin strokes.
Nothing is uploaded, so retrying is free
Every encode happens on your own CPU. That has two consequences worth stating: the photo of your face and your ID documents never leaves the device, and you can try a different crop, format or target as many times as you like without a queue, a daily quota or an account. The typical server-based converter allows two or three conversions a day before asking for money — here there is nothing to ration.
Other targets
20 KB · 100 KB · 200 KB · any target you type. For document photos, see also Passport Photo Maker.
Questions
What size photo fits comfortably in 50 KB?
Roughly 600 × 800 pixels of a normal portrait, or a full-width 1000 px landscape with simple content. Detailed scenes — foliage, crowds, film grain — need to be smaller because they carry far more high-frequency information.
The portal wants 20–50 KB, not just under 50.
Set the target to 50 KB and check the achieved figure in the result card. If it comes out below 20 KB, raise the target a little or use a larger source image — the search always returns the best-quality file that still fits.
Does compressing twice make it smaller?
It makes it worse. Each JPEG generation re-quantises coefficients that were already rounded, so artefacts compound. Always start again from your original file rather than re-compressing a compressed one.
Can I keep a PNG as a PNG?
Yes, but PNG is lossless, so the only lever is pixel dimensions. For photographs you will get a far better-looking 50 KB file by choosing JPG or WebP output.