TryImager

Resize a JPG

Set exact pixel dimensions or a target size in KB, and get a JPG back.

Resize a JPG to exact pixel dimensions or to a target size in KB, with the target-size mode running a real search over the JPEG encoder rather than guessing.

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Drop your image here

or choose an image from your device

Accepts JPG images · No fixed size limit — we adapt to what your device can handle. Very large files may take longer or show a warning.

About Resize JPG

How the target-KB search works

The tool encodes the resized image, measures the actual byte count, and adjusts the JPEG quality in a binary search until the output lands under your target. The number you see is the size of the file you're about to download, not an estimate.

Dimensions first, quality second

If a form caps uploads at, say, 200 KB, reducing the pixel width usually gets you there with a much higher, cleaner quality setting than trying to squeeze the same limit out of full-size dimensions.

Settings and output

Dimensions mode vs target size mode

Dimensions mode is for exact layout requirements. Target size mode is for byte limits — enter the KB figure the form specifies and the encoder does the rest, down to a minimum accepted target of 5 KB.

When to use it

  • Meeting an application or portal's strict KB limit for a JPG upload.
  • Scaling a photo down to the exact width a website layout requires.
  • Preparing several photos to a consistent size before uploading them as a set.

Limitations to know

  • The output stays a JPG — use a converter first if you also need a different format.
  • Aspect ratio isn't auto-linked; entering mismatched width and height will stretch the photo.
  • Enlarging a small JPG doesn't add real detail, only bigger, softer pixels.

Common problems and fixes

The target size search keeps failing to reach my limit.

The current pixel dimensions are too large for that KB target at any usable quality. Lower the width, then run the target size search again.

My resized photo is stretched.

Width and height were entered independently and don't share the original ratio. Type only one value, or match the ratio manually.

Is there any benefit to resizing larger than the original?

No — you'll get a bigger file with interpolated, softer pixels rather than new detail. Use the highest-resolution original you have instead.

How to use it

  1. 1Drop a JPG into the upload area.
  2. 2Choose 'Dimensions' to type an exact width and height, or 'Target size' to aim for a number of kilobytes.
  3. 3In target mode the encoder is run repeatedly at different quality values and the real output is measured each time until it fits — no estimating.
  4. 4Convert and download. The output stays a JPG.

Frequently asked questions

How does the target-KB mode actually work?

It encodes the image, measures the resulting bytes, and adjusts the JPEG quality in a binary search until the file lands under your target. The size you see is the size of the file you download.

What target size should I use for an upload form?

Forms that cap at 200 KB or 500 KB are common for ID and application photos — enter that number directly. The minimum accepted target is 5 KB.

Does resizing keep the aspect ratio?

Only if you enter matching numbers. Type both width and height yourself; mismatched values will stretch the photo.

Is enlarging a small JPG worth it?

Rarely. Scaling up interpolates new pixels and exaggerates existing JPEG artefacts — you get a bigger file, not more detail.

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