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NyankoTools
日本語

Image Filter & Color Adjustment Tool

Pick a photo and move the sliders to tweak brightness, contrast, saturation, and hue, or apply black & white, sepia, invert, blur, and sharpen. See the original and the result side by side, then save it. To blur only part of an image, try the Image Blur & Mosaic tool.

🔒 Runs in your browser · Your data is never sent to a server

You can also drag and drop an image file here

Presets
Output format

PNG is lossless, so the quality setting has no effect

How to use

  1. Choose an image file (drag & drop also works).
  2. Pick a preset or adjust brightness, color, and other sliders.
  3. Compare the before and after previews, then choose an output format.
  4. Click "Download" to save the result.

Notes

  • Every filter is applied with pixel math inside the page, so results look the same in Safari and other browsers regardless of CSS filter support.
  • Filters are applied in this order: brightness, contrast, saturation, hue, black & white, sepia, invert, blur, sharpen.
  • Large images can take a few seconds to process when saving, especially with a large blur value.
  • JPEG has no transparency, so transparent areas are filled with white. Choose PNG or WebP to keep it.
  • Exif metadata such as shooting location is not carried over, because the image is re-encoded.

Glossary

Contrast

The difference between light and dark areas. Raising it makes the image punchier; lowering it makes it flat and soft.

Saturation

How vivid the colors are. Lowering it moves toward gray, and -100 gives black & white. Raising it makes colors richer.

Hue

The kind of color, such as red, green, or blue. Rotating the hue shifts the whole image toward different colors.

FAQ

Do the filters work the same in Safari?

Yes. They do not rely on CSS or Canvas filter support. Every effect is computed pixel by pixel, so the result is the same across browsers.

Does saving change the size or quality of my image?

The pixel dimensions stay the same. JPEG and WebP are re-compressed, so file size depends on the quality setting. Choose PNG to avoid quality loss.

Can the preview differ from the saved file?

The preview is processed at a reduced size to stay fast, so blur and sharpen can look slightly different. Color adjustments match closely.

Is Exif data kept?

No. The image is re-encoded through a canvas, so Exif data such as shooting location is not included in the output.

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