Increase Image Size in KB
JPG, PNG or WEBP — pick the file, type the kilobytes the form demands, and download a copy that matches that number byte for byte. Nothing leaves your phone.
Drag & drop your image here
JPG, PNG or WebP — up to 20MB
Your images never leave your device
Works with any image format you have
An image size increase should not depend on what your phone happened to save. A cropped screenshot is usually PNG. An image saved from a website is often WEBP. A photo from the camera is JPG. All three land in the same place here: the file is decoded, redrawn at full quality, and written out as a JPEG sized to the exact kilobyte figure you asked for.
Format matters because most upload forms accept JPG only, or JPG and PNG. If you increase image size in KB but hand back a WEBP, the form rejects it for a different reason. That is why the download is always a standard JPEG that any portal, scanner or printer will open.
What each format does when you convert it
| Input format | What to expect |
|---|---|
| JPG / JPEG | Re-encoded at higher quality, then padded. Fastest path. |
| PNG | Transparent areas become white. Signatures stay crisp. |
| WEBP | Converted to JPEG, which most portals require anyway. |
| Screenshot (PNG or WEBP) | Often very small; the canvas upscales before padding. |
When you need an image size increase
Forms set a minimum because a very small file usually means a blurry, over-compressed scan that a human verifier cannot read. The rule is crude — it checks bytes, not clarity — so a perfectly sharp photo taken on a modern phone can still fail if the gallery app saved it efficiently. Increasing the file size satisfies the check without touching how the picture looks.
Two other situations come up often: a document scanner app that compresses everything to 15 KB by default, and a photo studio file that was resized for WhatsApp before being sent to you. In both cases the original is gone and re-shooting is not practical, so raising the size of the copy you have is the only fix left.
Nothing is uploaded, ever
Decoding, resizing and padding all run in your browser through the Canvas API. Your identity documents never travel across a network, which also means the tool keeps working on a weak connection. The privacy policy spells that out in full.
Related tools
- Working with camera photos only? Increase JPG size online with the free JPG tool.
- Unsure how kilobytes are measured on your phone? Read the KB increaser guide to reading and raising file size in KB.
Frequently asked questions
- Can I increase the size of a PNG image?
- Yes. Drop the PNG in and the tool redraws it on a canvas, then writes it out as a JPEG at your chosen kilobyte value. Portals that ask for a minimum size almost always accept JPEG, so this is usually what you want anyway.
- Does WEBP work too?
- It does, as long as your browser can decode WEBP, which every current version of Chrome, Safari and Firefox can. Screenshots saved from websites are often WEBP, and those are the files portals reject most often for being too small.
- My screenshot is 8 KB. Can it reach 100 KB?
- Yes. There is no ratio limit — the tool upscales the canvas and pads the file until the byte count matches. A tiny screenshot can reach several megabytes if a form asks for it.
- Will the image still look the same after the increase?
- Visually, yes. Encoding happens at high quality and the extra bytes sit in a metadata comment block that no viewer renders. Nobody reviewing your application will see a difference.
- The portal still rejects it. What else could be wrong?
- Most portals check pixel dimensions and aspect ratio as well as file size. Check the instruction sheet for a required width and height in pixels, and rescan or recrop if your photo does not match.
- Can I process several images one after another?
- Yes. Use the reset link after each download and pick the next file. Nothing is stored between runs, so each image starts clean.