Image Size Reducer

Two ways to reduce an image

Fewer pixels reduce the amount of image data: lower the maximum dimension while keeping the proportions. Lower encoding quality removes some detail from JPEG or WebP. Start with the size your destination needs, then adjust quality while checking edges, text, and fine detail in the preview. This tool begins with an 80% WebP quality setting and a maximum dimension of 1,920 px; those are adjustable starting points, not a promised saving.

Resizing examples and how to compare results

Photo for an article: 4,000 × 3,000 px resized to a 1,600 px maximum dimension gives 1,600 × 1,200 px. That is 1.92 megapixels instead of 12 megapixels. File bytes depend on the image and encoding settings; they do not decrease in a guaranteed proportion.

Small image: a 640 × 480 px input stays 640 × 480 px when the maximum dimension is 1,920 px. The tool never enlarges an image, but re-encoding may still change its file size.

Transparent graphic: select WebP to retain transparency with adjustable quality. Select PNG to keep lossless encoding of the rendered pixels; PNG has no quality slider, so reduce dimensions if its output is too large.

How to Use This Tool

Choose or drop a still PNG, JPEG, or WebP image.
Set the maximum dimension to the display size you need. The longer side will fit within that limit.
Try JPEG or WebP and adjust quality. PNG quality is not adjustable.
Select Reduce image size and compare the preview, dimensions, and file sizes.
If the result is still too large, lower the dimension or quality and run it again. Download only the version you want to keep.

Common Use Cases

Prepare photos for email attachments

Reduce product image dimensions

Create smaller website images

Shrink a screenshot while checking that text remains readable

Read the size result honestly

Compression cannot guarantee a smaller file: an already optimized source can grow after re-encoding. The tool compares the selected file with the actual exported bytes and explicitly reports a larger result. Keep the original when the new file does not help. KiB means 1,024 bytes and MiB means 1,048,576 bytes; an upload site may display decimal KB or MB instead.

Quality, transparency, and limitations

The quality percentage is an encoder setting, not the percentage of original detail or bytes retained. PNG ignores it. JPEG replaces transparency with the chosen background color, while PNG and WebP can preserve transparency. This tool does not target an exact file size, batch-process images, or preserve original metadata. Animated PNG and WebP are rejected; GIF, SVG, and HEIC are not supported. Input is limited to 50 MiB, 8,192 px per side, and 40 megapixels. Browser encoding can vary, so inspect the downloaded image before replacing your original.

Frequently Asked Questions

Can I guarantee an image under 100 KB?

There is no exact target-size mode. Compare the measured result, then reduce dimensions or JPEG/WebP quality and run it again until it meets your destination’s limit.

Will reducing size damage the original?

No. The selected original is read without modification. Download creates a separate file with a reduced suffix.

Why is quality disabled for PNG?

The browser’s PNG export does not use a lossy quality setting. Resize the image or choose JPEG/WebP when reducing file bytes is the priority.

Are my images uploaded?

No. Processing happens locally in this browser. Clearing the tool releases its image previews and processing resources.

Original

Reduced image