What this tool does
How the KB target works
Pixels, centimetres and percent
JPG, WebP or PNG?
Privacy: where the processing happens
Features explained
Target size presets and a custom value
The dropdown offers 10, 20, 50, 100, 200 and 500 KB, labelled with the form type they are often used for (signature, college form, job form, passport photo, web graphic). Choose Custom to type your own KB value. Check your form’s own instructions, since limits differ between portals. If the custom field is empty, the tool uses 100 KB.
Width and height in pixels, cm or percent
Switch the unit with the three buttons above the fields. This helps when one form asks for pixels and another for centimetres. Percent is handy when you simply want the image smaller without working out exact numbers.
Aspect ratio option
With the option on, filling one dimension is enough and the other is calculated from the original proportions. It does not correct values when you fill both fields.
Output format choice
Save as JPG, WebP or PNG. The format changes how well the KB target can be reached, as explained above.
Side-by-side before and after
The original card shows its KB size and pixel dimensions. The result card shows the new KB size, the final pixel dimensions and a preview. If the tool had to shrink the image to fit, the final dimensions show it.
Progress percentage and reset
While the image is processing, the button shows a percentage. Reset clears the image, the result and the width and height fields so you can start with another photo. There is no cancel button, so wait for a large image to finish or reload the page.
What can you use it for?
Photo for a job application
Many job portals set a limit around 100 KB and sometimes a fixed pixel size. Choose 100 KB and type the pixel size the form asks for.
Scanned signature
Signature fields often allow only 10 to 20 KB. Choose a small preset and, if the form gives a size such as 300 × 80 pixels, enter both values.
Passport or visa photo
Use cm mode for a size such as 3.5 × 4.5 cm and pick a KB limit such as 200 KB. Confirm the exact requirements with the issuing office or portal.
Admission or registration form
College and exam portals commonly cap uploads at around 50 KB. Use the 50 KB preset or a custom value.
Email attachment or web image
A photo straight from a phone can be several MB. Pick 500 KB or a custom value and a smaller width to make it lighter to send or publish.
Tool information
| Tool type | Image resizer and file size reducer |
|---|---|
| Accepted input | JPG / JPEG, PNG, WebP |
| Maximum input size | 50 MB per image |
| Images at a time | One |
| Output formats | JPG, WebP, PNG |
| Size presets | 10, 20, 50, 100, 200, 500 KB, or a custom KB value |
| Dimension units | Pixels, cm (converted at 300 DPI), percent |
| Processing | In your browser, on the main page thread |
| Network request by the tool | None found in the tool code |
| Download | Manual click on the download link |
| Progress display | Percentage shown on the button; no cancel option |
| Sign-in | No sign-in step in the tool |
Benefits
- Works from a single page, with no software to install.
- Shows before and after size and dimensions so you can check the result.
- Combines KB target, pixel size and cm size in one place.
- The tool does not upload your image.
Limitations
- The KB target is approximate. The result can land under the target or, occasionally, slightly over, so read the size on the result card.
- PNG output cannot be compressed with the quality setting, so reaching a small KB target with PNG depends on shrinking the image.
- Very small targets can force the tool to reduce the dimensions below what you entered. The final size is shown on the result card.
- A transparent PNG saved as JPG may get a black background.
- Only one image can be processed at a time, and only JPG, PNG and WebP are accepted.
- Very large images are processed on the main page thread and may make the page feel slow for a moment.
- There is no cancel button once processing has started.
Security
The tool files contain no code that sends your image anywhere. The page itself loads from the website like any other page, and this description covers the resizing tool, not other scripts the site may load, such as analytics.
Privacy
Your image is processed in your browser and is not uploaded by this tool. The resized file exists only in your browser until you download it or leave the page.
Tips
- Start with the 100 KB or 50 KB preset and look at the result before tightening further.
- For a signature or very small target, use JPG and expect a visibly softer image.
- Enter only one dimension with the aspect ratio option on if you want to avoid stretching the picture.
- Use JPG instead of WebP if the portal rejects your upload.
- To use another image, press Reset first.
Frequently asked questions
How do I make an image 100 KB for a job application?
Upload the image, choose 100 KB in the target size list, enter the pixel size your form asks for (for example 300 × 300) and click Resize Image. Check the size on the result card before downloading.
Can I set the size in cm for a passport photo?
Yes. Switch the unit to cm and enter the width and height, for example 3.5 and 4.5. The tool converts the values to pixels at 300 DPI, which gives about 413 × 531 pixels. The saved file stores pixels only, not a print size.
Why is my result not exactly the size I chose?
The tool searches for a quality setting that gets close to your target, and it does not hit the number exactly. The result can be a little smaller, or in some cases slightly larger. The size on the result card is the real one.
Why is the image smaller in pixels than what I typed?
When the file is still over the target after the quality search, the tool shrinks the image step by step. This usually happens with very small targets such as 10 or 20 KB. The final dimensions are shown on the result card.
Does PNG work for a KB target?
Not well. Browsers ignore the quality setting for PNG, so the tool can only reduce a PNG by shrinking its dimensions. Choose JPG or WebP when you need a specific KB size.
Is my image uploaded anywhere?
The resizing runs in your browser and this tool does not upload the image. The tool code contains no network request.
Which files and sizes are accepted?
JPG, JPEG, PNG and WebP images up to 50 MB. Other file types are rejected with an error message.
Can I resize several images at once?
No, this tool handles one image at a time. Press Reset to start with another one. For many photos, see the bulk image resizer.
Does it work offline or need an account?
There is no sign-in step. The page has to load from the internet first, and offline use is not something this page promises.