Resize Image to 20KB

How to resize image to 20KB

1. Choose your image above. Large phone photos and iPhone HEIC files are fine.
2. Leave Max size at 20 KB. If the form gives a lower limit, such as 10 KB, enter it as Min size.
3. If the form gives pixel or centimetre dimensions, open Dimensions & DPI and enter them, or tap a preset.
4. Use Crop & rotate if the face or signature is small in the frame.
5. Download the JPG and upload it.

What a 20KB image looks like

20 KB is about one two-hundredth of a normal phone photo. To fit, the image has to become small: usually between 200 and 400 pixels on the long side, depending on how much detail is in the picture. That is still plenty for a face on an admit card, which is printed only a few centimetres wide, and more than enough for a signature.

Results depend on the picture. A face against a plain wall fits at a larger size than the same face in front of trees or a patterned curtain, because plain areas compress very well. A signature on clean white paper fits at a much larger size than a photo, because most of it is empty white.

Which forms need a 20KB image

A 20 KB limit is most common for signatures. These are the 2026 official limits where 20 KB matters:

Notice the difference between a limit of "up to 20 KB" and a range that starts at 20 KB. For an IBPS photo, 20 KB is the floor, so a 19 KB photo is rejected; use the 50 KB resizer with Min 20 instead. For signatures, use the signature resizer, which also whitens the background and cuts empty margins.

Resize image to 20KB on Android or iPhone

You do not need an app. Open this page in your phone's browser and tap Choose photo. On Android you can pick from Gallery, Files or take a new photo with the camera. On iPhone you can pick from Photos or Files; HEIC photos are converted to JPG automatically. After resizing, tap Download JPG. On Android the file goes to the Downloads folder; on iPhone it goes to Files, and you can save it to Photos from the share sheet.

When you then open the application portal and tap the upload box, choose the file named like image-19kb.jpg from Downloads or Files. If your browser asks whether to keep the file, choose Keep.

Getting a clear image at 20KB

• Set the pixel size if the form gives one. A 200×230 photo at 20 KB has high JPEG quality. Without dimensions, the tool picks the largest size that fits, which is also fine for most forms.
• Crop tightly. Empty background around the face or signature uses bytes for nothing.
• Use a plain background and good light. Noise from a dark room is expensive to store and shows as blotches.
• Do not resize a resized image. Start from the original photo, not a screenshot or a WhatsApp copy.
• Check the preview. If the face looks blocky, the form probably allows more. Check whether the real limit is 50 KB.

Resize image to 20KB for bank and SSC signatures

Bank and SSC forms both use a 10–20 KB signature, but they describe the size differently. IBPS and SBI give pixels: 140×60. SSC gives centimetres: about 6.0 cm wide and 2.0 cm high (some SSC annexures say 4.0 cm). For IBPS and SBI, tap Signature 140×60 px. For SSC, choose centimetres under Dimensions & DPI, enter 6 and 2, and the tool converts them to pixels at 300 DPI (709×236 px) unless you type another DPI. GD 2026 asks for 300 DPI, which is exactly what the default writes into the file.

A signature on clean paper is mostly white, so at 140×60 it is often only 3–5 KB. That is below the 10 KB minimum, and the portal would reject it as too small. Set Min 10 and the tool adds padding inside the file to reach 10 KB; the signature itself does not change. On the signature resizer this happens together with background cleaning.

20KB, pixels and DPI

Three numbers describe an image for a form, and they are independent. The KB size is how much storage the file takes. The pixel size, such as 200×230, is how many dots the picture has. The DPI says how many of those dots should fit in an inch when printed. A 20 KB file can be 200×230 pixels at 200 DPI or 400×460 pixels at 300 DPI. When a form gives only a KB limit, ignore pixels and DPI. When it gives all three, set all three here, because some portals read the DPI written in the file.

Why some 20KB files are rejected

The most common reason is counting. A portal may treat 20 KB as 20,000 bytes or as 20,480 bytes, and it never tells you which. Files from this page are always under 20,000 bytes and the exact byte count is shown under After, so they pass both. Other reasons are a file below the minimum, the wrong dimensions, or a PNG renamed to .jpg. The tool always produces a real JPEG.

Need a different size?

Use the photo resizer in KB for any custom limit, the 50 KB resizer for bank exam photos, or the 100 KB compressor for declarations and documents.