Image Compressor to KB
100% private — your image is processed in your browser and never uploaded.
How to compress an image to a target size (KB)
Government and exam portals almost always cap the size of the photo and documents you upload — often at 50 KB, 100 KB or 200 KB. A normal phone photo is 2–5 MB, so it gets rejected with a "file size exceeds limit" error. The tool above fixes that: pick your image, choose the exact KB you need, and it shrinks the file to fit while keeping it as clear as possible — then you download the result. Everything happens inside your browser; your image is never sent to any server.
How to use it
- Tap Choose an image and select your photo or scan.
- Pick the target size the form asks for (e.g. 50 KB).
- Press Compress image — you'll see the new size and a preview.
- Tap Download and upload that file to the portal.
Why online forms reject large images
Portals limit upload size to save storage and keep their systems fast, so they enforce a hard KB cap. The catch is that modern phone cameras produce very large files, and a scan can be even bigger. Resizing in a photo app is fiddly and often overshoots, which is why a tool that targets an exact KB is so useful — you get a file that is just under the limit, not a blurry over-compressed mess.
How this tool works (and why it is private)
The tool redraws your image on a hidden canvas and saves it as a JPEG, stepping the quality down (and, if needed, the dimensions) until the file lands at or below your target KB. Because all of this runs in your own browser using standard web technology, your image never leaves your device — nothing is uploaded, stored or seen by anyone. That matters when the image is an ID, a signature or a personal document.
Quality vs size: getting a clean result
Smaller files mean lower quality, so there is a balance. A few tips for a sharp result at a small size:
- Crop first. Remove empty borders before compressing — fewer pixels means the tool can keep more quality.
- Pick the real limit, not lower. If the form allows 100 KB, target 100 KB, not 20 KB — you keep more detail.
- Use JPG for photos. Photographs compress far better as JPG than PNG.
- Start from the original. Compressing an already-compressed file repeatedly degrades it; always begin from the best copy you have.
Common upload sizes for Indian forms
| Use | Typical limit |
|---|---|
| Photo on most exam/portal forms | 20–100 KB |
| Signature | 10–50 KB |
| Scanned documents / certificates | 100–500 KB |
| UPSC / SSC photo | around 20–300 KB (check the notice) |
Always confirm the exact limit on the form you are filling — this is a general guide.
Photo & signature specs for popular exams
Every exam body sets its own photo and signature requirements, and they change year to year, so always confirm against the official notification. As a rough guide, these are the ranges commonly seen:
| Exam / form | Photo (typical) | Signature (typical) |
|---|---|---|
| SSC (CGL/CHSL) | 20–50 KB | 10–20 KB |
| UPSC | 20–300 KB | 20–300 KB |
| IBPS / SBI (bank) | 20–50 KB | 10–20 KB |
| NEET / JEE | 10–200 KB | 4–30 KB |
| TNPSC | 20–50 KB | 10–30 KB |
Set the matching number as your target above and compress. If the form also specifies pixel dimensions (for example a 200×230 photo), resize to those dimensions first, then compress to the KB limit.
JPG vs PNG vs PDF: which format to upload
Forms usually name the format they want, so match it exactly:
- JPG — best for photographs and signatures; smallest size for the same clarity. This tool outputs JPG.
- PNG — better for sharp line art and screenshots, but larger files; only use it if the form demands PNG.
- PDF — required when a portal wants a single document file. Convert your image to PDF after compressing if that is what is asked.
How to compress without losing too much quality
The trick is to remove unnecessary pixels before you compress, not to crush quality afterwards. Crop tight to the subject, straighten a scanned page, and make sure the photo is well lit so detail survives compression. If you only need 100 KB, do not force it to 20 KB — every extra kilobyte you are allowed is detail you keep. And always work from your highest-quality original; re-compressing a file that was already squeezed once stacks up visible artefacts.
Fixing common upload errors
- "File size exceeds limit" — compress to just under the stated KB cap using the tool above.
- "Invalid file format" — the form wants a specific type (JPG/PNG/PDF); convert to that format.
- "Dimensions not allowed" — the form also checks width × height in pixels; resize to the required dimensions first.
- Photo looks too dark after upload — a heavily compressed dark photo loses detail; brighten and re-shoot, then compress to the largest allowed size.
Frequently asked questions
How do I compress an image to 50 KB?
Choose your image above, select 50 KB as the target, and press Compress — then download the result and upload it.
Is my image uploaded anywhere?
No. Everything runs inside your browser; your image never leaves your device.
Will compressing reduce the quality?
Some quality is traded for a smaller size, but the tool keeps it as high as possible for your target. Pick the largest size the form allows for the best result.
What image formats are supported?
JPG and PNG inputs; the output is a JPG, which gives the smallest size for photos.
How do I compress a photo for an SSC or UPSC form?
Check the size limit in the official notice (often 20–300 KB), set that as the target here, and compress.
Can I compress a signature image?
Yes — choose the signature image and target the KB the form requires (often 10–50 KB).
Does it work on a phone?
Yes, it works in any modern mobile or desktop browser.
This tool runs entirely in your browser and does not upload or store your files. ComplyKraft is an independent site providing free utilities; we never collect your documents or personal data.