Image Tools · Browser-based utility
Compress Image Online Free — JPG, PNG & WebP
Compress JPG, PNG and WebP images locally with direct quality control or a target file-size mode, optional maximum dimensions, aspect-ratio preservation, no-upscale protection and live output estimation.
What this tool does
Compress JPG, PNG and WebP images locally with direct quality control or a target file-size mode, optional maximum dimensions, aspect-ratio preservation, no-upscale protection and live output estimation.
People often describe this task with phrases such as compress image online, reduce image size, image size reducer, compress image to kb, compress jpg and compress png. This page uses those terms only where they refer to the same underlying function.
How to use the Image Compressor
- Open the Image Compressor page and select or enter the source data required by the tool.
- Review the available controls instead of accepting defaults blindly when the destination has a size, format, layout or compatibility requirement.
- Run the operation and inspect the preview, status or generated result before treating it as final.
- Download or copy WebP, JPG, PNG and verify it in the destination application, browser, viewer or workflow that will actually use it.
Use the interactive tool above for the actual operation. The documentation below explains what the controls mean, what changes in the file/data, and how to troubleshoot common results.
Settings and capabilities explained
| # | Control or capability |
|---|---|
| 1 | Output format: WebP, JPG or PNG |
| 2 | Compression method: direct quality or target file size |
| 3 | Quality: 10–100 |
| 4 | Target size in KB with minimum and maximum quality bounds |
| 5 | Maximum width and maximum height |
| 6 | Keep aspect ratio |
| 7 | Prevent upscaling |
| 8 | JPG transparency background color |
| 9 | Multiple-image selection and ZIP workflow |
| 10 | Live estimated result |
| 11 | Newly encoded output does not carry the original EXIF/GPS metadata |
Supported input and output
- Input: JPG, PNG, WebP and browser-decodable images
- Output: WebP, JPG or PNG
How it works technically
Raster image operations work on decoded pixel data. Dimensions, alpha transparency, color representation and encoder settings can all affect the result independently.
File size is determined by more than quality percentage: pixel count, texture, noise, transparency, format and encoder behavior all matter.
Lossy quality controls are not linear: quality 50 does not mean exactly 50% of the original bytes.
Resizing from 4000×3000 to 2000×1500 reduces pixel count from 12 million to 3 million, a 75% reduction in pixel count before encoding.
Target-KB mode searches within a quality range to approach the requested size; exact byte matching may not always be possible because encoders produce discrete outputs.
Re-encoding pixel data into a new file normally omits source EXIF/GPS unless the application explicitly copies metadata.
Common use cases
- Reduce an image for a website upload limit
- Compress photos before email or messaging
- Reduce images to a target KB range for forms
- Shrink screenshots while keeping readable dimensions
- Batch-optimize several images
Choosing the right settings
- For photos, start around the tool’s 75–90 quality guidance and adjust after previewing the result.
- If quality reduction alone is insufficient, reduce maximum width/height because resolution strongly affects size.
- Use WebP for many web-delivery cases; use PNG when lossless transparency is required.
- For forms with strict KB limits, use target-size mode and set realistic minimum/maximum quality bounds.
Common problems and fixes
The file is still larger than my KB target
Lower the maximum quality, reduce dimensions, or choose a more compression-efficient output format.
The image looks blurry
Raise quality or preserve a larger resolution. Excessive downscaling can remove detail that cannot be restored.
A transparent PNG got a solid background
If you export JPG, choose the background color because JPG cannot store transparency.
Browser processing and privacy notes
The source code for this build performs the documented file transformation or analysis from browser JavaScript/Web APIs, and the video tools load FFmpeg.wasm for media processing. The site also contains third-party analytics, font/CDN and advertising scripts that can make ordinary network requests. Therefore, the precise claim made here is limited to the tool routine: it does not need a separate AutoClip file-upload API in order to perform the documented local operation.
For sensitive files, you should still use your browser’s developer tools or network controls if you need to independently verify the behavior of every third-party request in your environment.
Frequently asked questions
What does the Image Compressor do?
Compress JPG, PNG and WebP images locally with direct quality control or a target file-size mode, optional maximum dimensions, aspect-ratio preservation, no-upscale protection and live output estimation.
What input and output does it use?
Input: JPG, PNG, WebP and browser-decodable images Output: WebP, JPG or PNG Outputs include WebP, JPG, PNG.
Do I need to install desktop software?
No desktop installation is required for this page. The interactive workflow runs from the web browser. Some advanced media features load browser-side JavaScript/WebAssembly libraries when needed.
Are selected files processed through the tool interface?
Yes. The implementation reads selected files with browser APIs and performs the documented transformation or analysis in the page. External libraries, analytics and advertising scripts may make their own network requests, so this statement is about the file-processing routine itself.
Can I compress an image to 100KB or 200KB?
You can enter a target size in KB. The tool searches within the selected quality range to get close to the target, but exact byte-level equality is not guaranteed for every image.
Does the tool remove EXIF or GPS?
The interface states that newly saved images do not include the original EXIF/GPS metadata. This happens because the image is decoded and re-encoded rather than copied byte-for-byte.
The file is still larger than my KB target?
Lower the maximum quality, reduce dimensions, or choose a more compression-efficient output format.
The image looks blurry?
Raise quality or preserve a larger resolution. Excessive downscaling can remove detail that cannot be restored.