Image Resizer
Resize and crop a photo to exact pixels, centimetres or a target file size in KB.
- Free
- No sign-up
- Runs in your browser
or drop photos here
Paste with Ctrl/⌘+V · JPG, PNG, WebP or HEIC · several at once
Files stay on your device — nothing is uploaded
Need a specific size?
Pick one now or later — you can change everything after uploading.
ID, passport & exam forms
Social media
Exam and visa rules change between forms and years (SSC, UPSC, IBPS, NEET, passport…). Check the pixel size, KB range and background colour in your notification before you upload.
How the image resizer works
Pick the size you need in pixels, as a percentage, or in centimetres, millimetres or inches at a print resolution (DPI). Pixels are what websites and upload forms check; centimetres only matter when the photo is printed, and the DPI links the two: pixels = inches × DPI.
Example: a passport photo is 35 × 45 mm. At 300 DPI that’s 35 ÷ 25.4 × 300 = 413.4 → 413 px wide and 45 ÷ 25.4 × 300 = 531.5 → 531 px tall. A 1200 × 965 px photo resized to 50% becomes 600 × 482.5, which rounds to 600 × 483 px.
When the new size has a different shape from your photo, the crop box takes that shape so nothing gets stretched — drag it to choose what stays in the picture. If you set a file-size limit, the tool tries the highest JPG or WebP quality first and lowers it until the file fits, then (only if you allow it) reduces the pixel size as well.
Resize a photo to 20 KB, 50 KB or 100 KB
File size depends on pixels and detail. A 200 × 230 px form photo has 46,000 pixels, so 50 KB allows about one byte per pixel — plenty for a clear JPG. A 4000 × 3000 phone photo has 12 million pixels; squeezing that under 50 KB only works after shrinking it. Upload portals count a kilobyte as either 1,000 or 1,024 bytes, so the tool keeps the file under the stricter reading (50 KB → at most 50,000 bytes). If a form also needs a minimum size and a small image comes out below it, the quality is raised first and, if that isn’t enough, empty comment data is added to the JPG — the picture itself doesn’t change.
Passport, visa and exam-form photo sizes
| Preset | Size used |
|---|---|
| Passport photo | 35 × 45 mm · 413 × 531 px |
| US passport / visa | 2 × 2 in · 600 × 600 px · under 240 KB |
| Exam form photo | 200 × 230 px · 20–50 KB |
| Signature | 140 × 60 px · 10–20 KB |
These are common starting points. Recruitment and entrance exams such as SSC, UPSC, IBPS and NEET publish their own pixel sizes, KB ranges and background rules, and they change between years — always check the notification for your form and adjust the numbers. Most forms want a recent photo with a plain, light background.
Frequently asked questions
- How do I resize a photo to under 50 KB for an exam form?
- Upload the photo, pick “Exam form photo” (or type the pixel size from your notification), then open File size and set the maximum to 50 KB. The resizer lowers the JPG quality step by step until the file fits and shows the final size before you download. If your form also asks for a minimum, such as 20 KB, enter it too.
- Why is my file still too big at the exact pixel size?
- Every pixel costs some bytes, even at low quality. A very detailed or very large photo may not fit a small limit without losing pixels. Turn on “Allow smaller dimensions”, crop tighter, or choose a smaller size. PNG files can’t be compressed with a quality setting, so use JPG for KB limits.
- Does resizing reduce the photo’s quality?
- Making a photo smaller keeps it sharp; we shrink in halving steps to avoid jagged edges. Making it much larger than the original can’t add detail, so it will look soft. A KB limit lowers JPG quality, which is visible only when the limit is very tight.
- Are my photos uploaded anywhere?
- No. Decoding, cropping, resizing and compressing all happen in your browser. The photos never leave your device, and closing the tab discards them.
- Can I resize many images at once?
- Yes. Choose or drop several photos together. The size, format and KB settings apply to all of them, while crop and rotation stay separate for each photo. Download them one by one or all together as a ZIP file.