Resize photo and signature in KB
Make a photo or signature fit an upload limit in KB, at the pixel size a form asks for.
- 1 Choose files
- 2 Adjust
- 3 Download
or drag and drop here
JPG, PNG, WebP, HEIC · 30 MBProcessed on this device. Your files are never uploaded.
- ✓ Free
- ✓ No account
- ✓ Files stay on your device
Prove it’s private
This panel counts the network requests this page makes after you choose a file, and how much each one sends. Your file is read and changed on this device. Our code never sends it anywhere.
- Requests since you chose a file –
- To pdfreadygo.com, for tool code and fonts –
- To ad and analytics services –
- Requests that sent a file or binary data –
- Most data sent in one request –
Ads and analytics can keep making small requests while you work, and they are counted above. Compare the largest one with the size of your file.
Before you chose a file, this page made 0 requests to load itself, its ads and its analytics. This counter can’t see inside ad frames, and ad frames can’t read your file. It also doesn’t list the tool’s background workers, which only load code from this site.
Test it yourself with airplane mode
- Open this page while you are online and wait a few seconds, so it can save itself for offline use.
- Turn on airplane mode, or turn off Wi-Fi and mobile data.
- Choose your file and run the tool. It still works, because nothing has to be sent.
A few extras, such as the HEIC photo decoder, are only saved after you first use them. Offline, they show an error instead of sending anything.
Application forms often ask for a photo or signature as a JPG under a set size in KB, sometimes with exact pixel dimensions. Pick a preset or type your own numbers, and the tool finds the highest JPEG quality that fits. It opens JPG, PNG, WebP and iPhone HEIC photos and always saves a JPG.
Good to know before you begin
This tool changes the size of an image. It can’t tell whether a portal will accept your photo, and PDFReadyGo is not connected to any government or exam body. Background, lighting and pose still matter, so check the rules of the site you are uploading to. Transparent areas in a PNG become white.
How to resize a photo or signature in KB
- Select Choose a photo, or drag your image onto the box.
- Pick a Preset, or type a Maximum size in KB and, if the form asks for one, a width and height in pixels.
- If the shape changes, choose Crop to fill, from the center for photos, or Fit inside, with white edges for signatures.
- Select Resize photo →. The tool tries JPEG quality settings until the file fits.
- Check the preview and the line under Your file is ready., then select Download result ↓.
The presets and where the numbers come from
- Signature · 10 to 20 KB · 6.0 × 2.0 cm: a JPG between 10 KB and 20 KB, 472 × 157 pixels at 200 DPI, so it prints at about 6.0 × 2.0 cm. This follows the signature rule in the SSC Combined Graduate Level 2026 notice (SSC notice, checked Nov 2, 2026).
- Photo · under 50 KB · same shape: keeps the shape of your photo and makes the file smaller until it fits under 50 KB.
- Passport size · 35 × 45 mm · under 50 KB: 413 × 531 pixels, which is 35 × 45 mm at 300 DPI, cropped from the center. Many forms use this photo size, but some want a different size or limit, so check yours.
- Passport Seva photo · 630 × 810 px · under 250 KB: Passport Seva’s photo upload instructions ask for a JPEG of exactly 630 × 810 pixels and less than 250 KB, and a signature of no more than 100 KB (Passport Seva instructions, checked Nov 2, 2026).
PDFReadyGo is not connected to SSC, Passport Seva or any other portal, and a preset does not mean a portal will accept your photo. Rules change, so check the current notice for your form.
What we got in our tests
We tested with a 12-megapixel phone photo (2.99 MB JPG, and the same photo as a 9.75 MB HEIC) and a signature scanned at 2400 × 900 pixels. These sizes come from Chrome on Android. Safari on iPhone gave files a few KB larger, still under each limit.
- Signature preset: 12.6 KB, 472 × 157 pixels, at 95% quality.
- Photo under 50 KB: 41.7 KB, 786 × 1048 pixels, at 70% quality. The photo was made smaller than the original to fit.
- Passport photo 35 × 45 mm: 32.7 KB, 413 × 531 pixels, at 92% quality. The HEIC copy gave the same result.
- Custom 5 KB at 2000 × 2000 pixels: this can’t fit, so the tool said so and offered its smallest version, 73.1 KB.
Frequently asked questions
Is my photo uploaded?
No. The photo is read and resized in your browser on your own device.
Why is my file smaller than the limit?
The tool picks the highest JPEG quality that fits. If even the highest quality is under the limit, you get that, which can be well below it. If the form also has a minimum, type it in Minimum size in KB, and the tool tells you if it can’t reach it.
Can it open iPhone HEIC photos?
Yes. Safari opens them directly. In other browsers, the tool downloads a decoder of about 3 MB from this site the first time. Your photo still stays on your device, and the result is always a JPG.
What does print resolution change?
Only the printed size saved in the file, such as 300 DPI. The pixels stay the same. Some forms check it, and many ignore it.
Is 20 KB counted as 20,000 or 20,480 bytes?
Portals differ, and few say. The tool aims at or under 1,000 bytes per KB, which fits either way.
Can I make a PDF a set size instead?
Yes. Use Compress PDF and pick a target size, or a page such as Compress PDF to 100 KB.
Having trouble? Read the FAQ or visit help and contact.