Resize Image to KB: Reduce a Photo to 20KB, 50KB, 100KB or Any Size

Need a photo under 50 KB for an application form, or under 200 KB for a job portal? Pick a target size and the tool finds the highest quality that fits, adjusting dimensions only when it has to. It runs in your browser, so your image is never uploaded.

Drop an image to reduce to 100 KB

Choose image

JPG, PNG, WebP · up to 50.00 MB · one image at a time · or paste with Ctrl+V

Processed in your browser. Your image is not uploaded.

How to resize an image to a specific file size

Choose, drop or paste your JPG, PNG or WebP image.
Pick a target: 20 KB, 50 KB, 100 KB, 200 KB, 500 KB, or Custom for any size in KB or MB.
Leave Allow smaller dimensions on unless your form requires exact pixel dimensions.
Select Resize. The result shows the original size, target, final size and saving.
Check the preview, then download.

How the tool reaches your target size

File size can't be set directly; it depends on the image content, its dimensions and the compression quality. So the tool searches for the best combination:

It first tries your image at full size and high quality. If that already fits, you get the best possible result.
Otherwise it searches quality levels at full size, down to a level that still looks good, to find the highest quality that stays under your target.
If quality alone isn't enough, it reduces the dimensions step by step, keeping quality good, until the file fits. Then it raises the quality again to use as much of your size budget as possible.
Every attempt is measured using the real encoded file, so the size you see is exactly the size you download.

Read the methodology for the technical details.

Why an exact byte size isn't always possible

JPG and WebP files can only be produced at certain quality steps, and each step changes the size by a variable amount. That's why the goal is “at or below” your target, which is what upload forms check, rather than a precise byte count. If the target is extremely small and dimension changes are turned off, the tool reports the closest size it could achieve and explains why, instead of claiming success.

Dedicated pages for common sizes

This page handles any target. For the most common limits there are pages with the target preset and advice for that size: 20KB photo, 50KB photo, 100KB photo and 200KB photo. Preparing an exam or passport photo with a pixel size too? See the passport photo requirements or exam pages such as IBPS photo.

Typical size limits

Requirements vary widely, so always check the exact rules of the form you're filling in. Common examples include:

Photos and signatures on application forms: often small limits such as 20 KB, 50 KB or 100 KB, sometimes with a minimum size too.
Document scans for portals: often 200 KB to 1 MB per file.
Email and chat attachments: smaller images send faster, even when limits are generous.

Tips for the best quality at small sizes

Crop away empty background before reducing the size, so the size budget goes to what matters.
Plain, evenly lit backgrounds compress much better than busy or noisy ones.
If you need exact pixel dimensions, resize the image to those dimensions first, then set the file size here with “Allow smaller dimensions” turned off.
Just want a smaller file without a specific target? Compress the image instead.
If your form needs a minimum size as well as a maximum, choose a target near the top of the allowed range. If a file is below the minimum, increase its size in KB.

Privacy: your image stays on your device

Images resized to a target size are often personal: ID photos, signatures and documents. Every step of the search runs in your browser on your own device, and nothing is uploaded or stored.

Read the privacy policy or see how the tools work for details.

Frequently asked questions

How do I resize an image to 50 KB?

Select your image, choose 50 KB as the target size and select Resize. The tool finds the highest quality that keeps the file at or below 50 KB, shrinking the dimensions only if needed, and shows the exact result before you download it.

Can every image be reduced to exactly 100 KB?

Not to the exact byte. Image encoders work in steps, so the result is the best file at or below your target, for example 96 KB for a 100 KB limit. That is what upload forms check. In rare cases, such as a very small target for a very detailed image with dimension changes turned off, the target can't be reached and the tool shows the closest achievable size instead.

Why did the dimensions of my image change?

When even a reasonable quality setting can't fit your image under the target, the tool makes the image smaller instead of crushing its quality. A sharp 1200-pixel photo usually looks far better than a blocky full-size one. Turn off “Allow smaller dimensions” if your form needs the original dimensions.

Will reducing an image to 20 KB make it look bad?

It depends on the image. A passport-style photo or a signature can look clear at 20 KB, while a detailed landscape photo will need to become quite small to fit. Check the preview before downloading; if it looks too soft, use a larger target if your form allows it, or crop away unneeded background first.

Is 1 KB 1,000 or 1,024 bytes?

This tool uses 1 KB = 1,024 bytes, the same as Windows and most upload forms. A few systems count 1 KB as 1,000 bytes. If a form rejects your file, choose a slightly lower target, such as 48 KB for a 50 KB limit. The exact byte count is always shown with the result.

My form needs both specific dimensions and a file size. What should I do?

First use the image resizer to set the exact width and height, then bring that resized image here and turn off “Allow smaller dimensions” so only the quality is adjusted to meet the size limit.

Are my photos and documents uploaded?

No. The whole search for the right size runs in your browser on your device. Your ID photo, signature or document is never sent to a server.