Rekto DigitalFree toolsImage resizer in KB
Reduce image size in KB
Updated October 28, 2026 · Free, no sign-up, no upload
Resize an image by KB to the size a form asks for: 20 KB, 50 KB, 100 KB or any limit you type. You get the sharpest JPG that fits, made in your browser; the photo never leaves your device.
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Other sizes
Any image sizeImage to 10 KBImage to 15 KBImage to 20 KBImage to 30 KBImage to 40 KBImage to 50 KBImage to 100 KBImage to 200 KBImage to 300 KBImage to 500 KB
How to resize an image in KB
- Choose your photo. JPG, PNG and WebP all work, including photos straight from your phone.
- Pick the size in KB. Choose one from the list, or Other size to type your own; add a width in pixels if the form asks for one.
- Resize. The new JPG downloads straight away, with a preview, its size and its dimensions.
We tested it: one photo, every size
We ran this tool on a 1855 × 2379 px face-and-shoulders photo (1.2 MB) on October 28, 2026 (300 KB on October 30, 2026), with no width typed:
| Limit | After | Pixels | Quality |
|---|---|---|---|
| 10 KB | 10 KB | 311×399 | 59% |
| 15 KB | 15 KB | 389×499 | 61% |
| 20 KB | 20 KB | 486×624 | 57% |
| 30 KB | 29 KB | 608×780 | 56% |
| 40 KB | 39 KB | 760×974 | 48% |
| 50 KB | 49 KB | 760×974 | 60% |
| 100 KB | 100 KB | 1187×1523 | 52% |
| 200 KB | 199 KB | 1484×1903 | 65% |
| 300 KB | 299 KB | 1855×2379 | 62% |
| 500 KB | 498 KB | 1855×2379 | 80% |
Forms usually want far fewer pixels than a phone takes: type the width they ask for and the KB go into quality instead.
How it keeps the photo sharp
The tool saves your photo as a JPG and tries the highest quality first, then lowers it step by step until the file fits. If even a low quality is too big, it reduces the dimensions a little and tries again, so you never get a blurry photo at full size when a slightly smaller sharp one would fit.
Photo sizes forms ask for
| Upload | Size | Dimensions |
|---|---|---|
| Staff Selection Commission (SSC) exams: signature | 10 to 20 KB | about 6.0 × 2.0 cm |
| Exam and job portals: signature | up to 15 KB | as stated in the notice |
| Bank exams (IBPS): signature | 10 to 20 KB | 140 × 60 px |
| Exam and job portals: passport photo | up to 30 KB | as stated in the notice |
| Exam and job portals: passport photo | up to 40 KB | as stated in the notice |
| Bank exams (IBPS): photograph | 20 to 50 KB | 200 × 230 px |
| Bank exams (IBPS): handwritten declaration | 50 to 100 KB | 800 × 400 px |
| US visa application (DS-160): photo | up to 240 KB | square, 600 to 1200 px |
| Some UPSC notices: photo and signature | 20 to 300 KB | others cap them at 200 and 100 KB |
| Document photos (certificates, ID cards) on application portals | up to 500 KB | as stated on the form |
These are typical limits; the official notice for your form always has the final word, and limits change between years. If a form gives a range such as 20 to 50 KB, choose the top of the range: the tool keeps the most quality that fits. See the official limits for SSC, IBPS, SBI, NEET, JEE and GATE.
Tips for a clear, small photo
- Crop first so the KB go to what matters.
- Signatures and documents: Black and white gives a clean, high-contrast look.
- Exact dimensions? Type the width; the height follows, keeping the proportions.
Questions
How do I reduce a photo to a size in KB?
Choose your photo on this page, pick or type the size in KB and press Resize image. You get a JPG under that size, at the highest quality that fits, with no sign-up and no watermark.
Is my file uploaded?
No. The tool runs in your browser on your own device, so your file is never sent to our server or anyone else's, and it is gone when you close the page.
Will my photo lose quality?
The tool first lowers the JPG compression, which is barely visible, and only shrinks the dimensions if that is not enough. It always picks the best quality that still fits your limit.
Why is the result a JPG?
JPG makes the smallest photos and is the format almost every form accepts. Transparent PNG backgrounds become white.
Is a KB 1000 or 1024 bytes?
Forms differ: some count 1 KB as 1000 bytes, others as 1024. To be safe, this tool counts 1000, so a file made for a 100 KB limit is at most 100,000 bytes and passes either way.
Can I do this on my phone?
Yes, this page works in a phone browser and saves the photo to your downloads. To turn photos into a PDF document instead, use JPG to PDF, or the free Kind PDF app on Android.
Documents to shrink too?
Compress PDFCompress PDF to 50 KBCompress PDF to 100 KBCompress PDF to 150 KBCompress PDF to 200 KBCompress PDF to 300 KBCompress PDF to 400 KBCompress PDF to 500 KBCompress PDF to 1 MBCompress PDF to 2 MB
Scan documents on AndroidKind PDF is our free PDF app for Android: compress, scan, sign, combine and convert to Word, all on your phone with no watermark and no account.