Reduce Image Size
Reduce image file size by target KB, quality, or dimensions, with a clear before and after report. Everything runs in your browser.
Best for trimming file size. Example: prepare an image to attach to a message.
Before you use: both the dimensions and the format affect the final size.Best for: a quick smaller file. Not ideal for: resizing dimensions.
- Add an image.
- Lower quality to cut the file size.
- Get a smaller file.
Reduce Image Size is a browser-based image tool on ImgToolsBase. Reduce image file size by target KB, quality, or dimensions, with a clear before and after report. Everything runs in your browser. To use it, upload or drop your image and view the result directly in your browser — no signup and nothing to install.
How this tool works
What it does
Reduces image file size through quality, a target size in KB, or smaller dimensions, and reports exactly how much was saved. It keeps your format unless you convert.
Before and after
The result panel shows original size, output size, percent saved, original and output dimensions, and the output format, so you can see the effect of each setting.
Privacy
Images are processed on your device with no upload, and re-encoding strips EXIF and GPS metadata. Your files are never sent to imgtoolsbase or any other server.
Reduce Image Size in your browser
Reduce Image Size is a broad tool for making any image smaller, with a focus on showing you the result. It works privately in your browser and reports the before and after on every run.
Reduce by quality, set a target size in KB, or limit dimensions. Keep your original format with Same as input, or convert to JPG, PNG, or WebP when that helps.
How to use Reduce Image Size
- Drop in any image, or click the upload box to choose a file.
- Choose to reduce by quality, by Target file size in KB, or by dimensions.
- Optionally change the output format or set a background for JPG.
- Click Process, read the before and after report, then click Download.
Why use this tool
Lower quality, aim for a target size in KB, or shrink dimensions, in whatever combination you need.
See original size, output size, percent saved, and dimensions after every run.
Default is Same as input. Convert to JPG, PNG, or WebP when a different format is smaller.
All processing happens in your browser, so images are never uploaded.
Common uses for Reduce Image Size
Make any image smaller for the web, email, or storage.
Work toward a KB cap with target mode and the size report.
Resize to a maximum width, height, or percentage.
Use the before and after numbers to tune quality and size.
When to choose Reduce Image Size
This tool is for getting an image under a file-size limit for a form, portal or email cap.
Worked example: An upload form rejects anything over 2 MB. Reduce the image until it slips under the cap, then submit without hunting for desktop software.
Reduce Image Size is about hitting a byte target; if a site instead specifies pixel dimensions, use the image resizer.
- Note the exact limit you must meet before you start reducing.
- If quality suffers too much, try lowering the dimensions a little as well as the quality.
How can I reduce an image to under 1 MB?
Step the quality down until the output is below 1 MB; combining a small dimension reduction helps when quality alone is not enough.
Does reducing size always lose quality?
Some quality is traded for size, but a sensible target keeps the loss imperceptible on screen.
Frequently asked questions
What does the before and after report show?
It shows original size, output size, percent saved, original and output dimensions, and the output format for each run.
How do I reduce to a target size?
Switch to Target file size, enter a KB value, and the tool lowers quality and dimensions as needed to approach it, then reports the achieved size.
Can I keep my original format?
Yes. The default is Same as input. You can convert to JPG, PNG, or WebP if that gives a smaller file.
Is EXIF and GPS data removed?
Yes. Re-encoding strips EXIF, GPS, and color-profile data, and the result panel notes this.
Does the image stay on my device?
Yes. The image is processed in your browser and is never uploaded, so it stays on your device.
Related image tools
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