Compress an image to under 50 KB
Government portals, ID scanners and signature uploads draw the line lower than most tools can reach honestly. 50 KB is a genuinely tight budget — this page opens the compressor with it already set, and the engine spends every byte deliberately: quality first, resolution only as a last resort.
- Nothing is uploaded
- Budget: 50 KB
- JPEG · WebP · AVIF · PNG
- Unlimited & free
Drop your images here
or paste from the clipboard · ⌘V / Ctrl+V works too
JPG · JPEG · PNG · WebP · AVIF · HEIC · GIF · BMP — no file count limit
Compression settings
Applied to every imageAuto measures each image: it encodes a test pass at several quality levels, scores the result against the original, and keeps the smallest file that still clears a ~40 dB fidelity floor.
Advanced options
Auto applies a halo-free unsharp mask only when an image is scaled below 82%.
Generated in your browser by a synth — no audio file is downloaded, and it stays silent when a batch finishes in a couple of seconds.
WASM codecs are fetched from a public CDN on first use and give slightly smaller files. Every fallback still works offline.
Results
Where the 50 KB limit comes from
Fifty kilobytes is not a design choice — it is what happens when a form is built around documents rather than photographs. The systems that actually enforce it:
| Where | Typical limit | Notes |
|---|---|---|
| Passport and ID photo uploads | 20 KB – 100 KB | Usually paired with fixed pixel dimensions |
| Visa and immigration portals | 30 KB – 100 KB | JPG, face must fill a set fraction of the frame |
| Online signature and stamp uploads | 20 KB – 50 KB | Almost always a fixed-height scan |
| Government tender and exam forms | 20 KB – 100 KB | Photo plus signature as separate files |
| Forum avatars and classic CMS thumbnails | 30 KB – 60 KB | PNG or JPG |
How to make 50 KB look good
At this budget the encoder cannot save you on its own — the input has to cooperate. Four things matter more than any setting:
- Crop to the required frame first. A 600 × 600 passport crop compresses cleanly at 50 KB; the same face floating in a 4000 × 3000 living-room shot cannot. Cropping away everything the form does not need is the single biggest quality win.
- Match the pixel dimensions the portal names. If it says 300 × 400, resize to exactly that (Advanced options → Resize — maximum edge, or your photo app) before compressing. Compressing a huge image and then shrinking the file twice always looks worse.
- Never send a photograph as PNG. A photo stored as PNG carries five to ten times the bytes of the same picture as JPG — at 50 KB that difference is the whole budget.
- Prefer WebP when the portal accepts it. WebP reaches the same look in roughly 70 percent of the bytes, which at this budget buys back visibly more detail.
How the engine spends such a small budget
The target-size search on this page works the same way as on the other budget pages: it binary-searches encoder quality up to seven passes, and touches the pixel dimensions only when no quality setting can reach 50 KB. Two details matter specifically at this size. First, the number shown in the results panel is the real byte count of the finished file, not an estimate — a file reported as 49 KB will not suddenly arrive at the portal as 52 KB. Second, if the honest answer is that this image cannot fit at acceptable quality, the tool still gives you the best 50 KB version it can and shows you exactly what it did, rather than quietly wrecking the image.
Other budgets in one place
If the form you are fighting asks for a different number: compress an image to 100 KB is the most common general-purpose limit, compress an image to 200 KB covers university and marketplace uploads, and compressing photos for email handles whole batches at once. The main compressor accepts any target you type.
Frequently asked questions
Can I compress an image to exactly 50 KB?
Yes — pick Target size and enter 50. The engine binary-searches encoder quality until the output fits under 50 KB, and shows the real byte count of the finished file rather than an estimate.
50 KB is very small — what happens to my photo?
The engine tries quality adjustments first and only reduces the pixel dimensions when no quality setting can reach the budget. A 12-megapixel camera photo will usually be scaled down in steps to roughly a web-size frame; a cropped ID photo at 300 × 400 pixels normally fits at 50 KB with good quality.
Which format works best at 50 KB?
For photographs, JPG or WebP — WebP typically needs about 30 percent fewer bytes for the same look, which leaves more quality inside the budget. For scans of documents, signatures and forms, PNG with palette quantization often wins because text survives compression better than photographic detail.
Is 50 KB enough for a passport or ID photo?
Usually yes. Most passport and visa portals ask for a fixed frame between 240 × 320 and 600 × 600 pixels with a size cap between 20 and 100 KB. Crop the photo to the required dimensions first, then compress to 50 KB — a properly cropped ID photo is small enough that the quality stays clean.
Can I do this on my phone?
Yes. The page is touch-first and the compressor runs on any modern mobile browser, so you can shrink a photo or scan to 50 KB straight from an iPhone or Android device without installing anything.
Are my images uploaded to a server?
No. This is a static site with no upload endpoint. Your images are decoded, resampled and re-encoded inside your own browser, so they cannot leave your device even by accident.