Free Online Image Enhancer
Pick a correction for one JPG, PNG, or WebP image, then fine-tune any value. The preview follows you and the full-size file follows the preview. The selected image content is processed locally in your browser.
Drag and drop files here
or
How to Enhance an Image
- Choose one JPG, PNG, or WebP image
- Pick a correction, such as Photo boost, Low light, Document scan, or Black and white
- Open Fine-tune to change brightness, contrast, saturation, sharpness, blur, grayscale, or the output format
- The full-size file is rendered as you settle on the settings; download it when it appears
Features
- One-click corrections for photos, low light, scans, black and white, and softening
- Brightness, contrast, and saturation controls
- Edge sharpening with a corrected RGBA pixel kernel
- Browser blur and grayscale effects
- Scaled preview while you drag, then a full-resolution render for the download
- PNG, JPG, and WebP output with quality control where supported
- Large-image memory review before processing
- Selected image contents are processed locally in your browser
Frequently Asked Questions
How does the image enhancer work?
Pick a correction, such as Photo boost or Document scan, and it sets brightness, contrast, saturation, sharpness, blur, and grayscale for you. The browser Canvas API applies them to a scaled preview while you adjust, then renders the full-size file once the settings sit still. Processing stays on your device.
Is my image uploaded to a server?
No. The image is decoded, previewed, processed, and exported locally in your browser. It is not uploaded to ToolkitFree.
What file formats are supported?
You can open JPG, PNG, and WebP images. You can export the processed image as PNG, JPG, or WebP.
What does the sharpness slider do?
It increases local edge contrast with a small sharpening kernel. It can make a slightly soft image look crisper, but it cannot restore missing detail.
What is the difference between brightness and contrast?
Brightness shifts the overall light level. Contrast changes the difference between lighter and darker areas.
Can I combine multiple adjustments?
Yes. The preview combines every adjustment, and each correction preset is simply a set of them. Open Fine-tune to change any single value, and the reset link there returns the whole set to the preset you chose.
Will the exported image lose quality?
PNG preserves the processed pixels without lossy compression. JPG and WebP can reduce file size by discarding some detail, so they include a quality control.
Can this tool fix a badly blurred photo?
No. Sharpening can emphasize existing edges, but it cannot reconstruct detail that is absent from the source image.
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