Processed entirely on your device — nothing is uploaded
How to use the compress image to 30 kb
- 1Drop your image onto the box above — the 30 KB target is already selected.
- 2Leave the output format on the default (JPG) if this is for an upload portal.
- 3Wait a moment while the tool searches for the best quality under the cap.
- 4Check the reported size and dimensions, then download the 30 KB file.
What actually fits in 30 KB
30 KB sounds abstract until you convert it into pixels: at the 1.8 bits per pixel a mid-quality JPEG spends, the budget is close to 139,500 pixels, or a photo of about 430 × 320. Put differently, it holds about 430 × 325 pixels of photograph at sensible quality.
Prints acceptably at around three centimetres. Beyond that the softness becomes obvious, so keep it for screens and forms.
Content bends the numbers: a signature or line drawing on plain white paper compresses several times better than a busy photograph, so it fits at 30 KB with dimensions the arithmetic above would call impossible. A crowd scene or foliage goes the other way.
Where the 30 KB limit comes from
This page exists because upload forms reject files, and they reject them at round numbers. The situations that bring people here: a photo for a state recruitment portal that caps at 30 KB, an ID photo for a college or hostel form, or a compact headshot for an internal directory.
30 KB shows up on state government portals and older application systems, sitting just above the classic 20 KB exam cap and below the 50 KB one.
However the 30 KB cap reached you, the problem has one shape: the file is bigger than the form will take, the error message is unhelpful, and guessing at export settings burns a submission attempt per guess. Naming 30 KB as a target and letting the tool search for it is the mechanism the job actually calls for.
How this tool reaches 30 KB exactly
The compressor binary-searches JPEG quality: encode, measure against 30 KB, halve the range, repeat. Eight rounds land within about one quality point of the largest encode that still fits, and since it all happens in this tab's memory, the search takes well under a second per image.
Quality alone rarely gets a camera image under 30 KB: a 4,000 × 3,000 phone photo overshoots the 139,500-pixel budget even at the quality floor, so the tool rescales it — to roughly 431 × 323 in that case, estimated from how far over the attempt landed — and searches again. The result line shows the final dimensions, so the trade is never silent.
On format: WebP reaches 30 KB at higher quality than JPG, and upload portals reject it anyway. Keep the default JPG output for anything with a size cap; save WebP for your own website.
Because files at 30 KB caps are so often signatures, ID photos and documents: nothing here leaves your device. Decoding, rescaling, the quality search and the final encode all run inside this browser tab — there is no upload and no server-side copy.
Getting the best result at 30 KB
Crop before you compress — it is the single biggest lever at 30 KB. A signature photographed on a full sheet spends most of its 139,500-pixel budget on blank paper; cropped tightly to the ink, the same budget holds several times the detail. The crop tool linked below takes seconds.
At 30 KB, the quality of the source matters more than its resolution: a well-lit, high-contrast original (dark ink, white paper, no shadows) survives the squeeze; a dim, grey one does not. Persistent legibility rejections are a photography problem, not a compression one.
Portals that cap size at 30 KB often cap dimensions too. When yours does, resize to the demanded width and height first, then compress here — in that order the encoder is not fighting excess pixels, and more of the 30 KB goes to quality.
At 30 KB you are close enough to 25 and 50 that the choice of target barely changes the visible result — what changes it is the crop. A head-and-shoulders crop at 30 KB looks sharper than a half-body shot at 50, because every byte is spent on the part of the picture anyone will actually look at.
Frequently asked questions
How do I compress an image to exactly 30 KB?
Drop the image above — the target is preset to 30 KB on this page. The tool searches out the highest quality that fits under the cap, shrinking dimensions automatically if it must, and reports the final size before you download. No upload, no watermark, no sign-up.
Will my image still look good at 30 KB?
Good enough for its purpose is the honest answer. 30 KB cannot hold fine photographic detail, so expect softness on faces; signatures and line art fare far better. A tight crop beforehand is the biggest quality lever you have.
Why did the dimensions of my image change?
Because they had to. 30 KB is a budget of roughly 139,500 pixels of JPEG, and no quality setting squeezes a full-resolution photo under it. When quality alone cannot reach the target the tool rescales and searches again — the result line always reports the final dimensions.
Is my photo or signature uploaded anywhere?
It is not. The whole 30 KB search happens inside this tab — your browser does the decoding, scaling and encoding locally, and the site never receives the file.
The portal wants specific pixel dimensions as well as 30 KB. What order do I do that in?
Resize to the required dimensions first (the Image Resizer linked below does that), then compress the resized file to 30 KB here. In that order the compressor is not fighting excess pixels, so more of the budget goes to quality.
Does this work with PNG and WebP files too?
Yes — PNG, WebP and AVIF are all accepted and re-encoded toward 30 KB. PNGs convert to JPG by default, since lossless PNG cannot hit small byte targets on photographs, and JPG is what upload portals expect anyway.