Or paste an image from the clipboard while this workspace is focused.
PNG, JPEG, static WebP or BMP. 40 MiB/file, 24 MP, 8192 px/side; pixel operations 6 MP. GIF: 120 frames and 24 MP across all frames. Split: at most 256 pieces.
Checkerboard areas indicate transparency. Previews fit the screen; downloads keep the displayed pixel dimensions.
Details
Image exports re-encode pixels; Base64 encode/decode preserves original bytes. BMP 1/4/8/16-bit and GIF reduce colors. BMP 4/8-bit palettes use up to 8/128 colors. JPEG fills transparency.
IMAGE WORKSPACE
Understand the task
A raster pixel stores red, green, blue and often an alpha value. Alpha zero means fully transparent; 255 means opaque. Color-key removal compares RGB distance to the selected color. Tolerance expands the matching range, while a soft edge fades the transition.
What this tool does
Replace a color · Remove a color · Keep only a color · Fill transparent regions · Scale opacity · Alpha mask · Alpha channel as grayscale · Flatten alpha · Set constant alpha · Red channel · Green channel · Blue channel · Reorder channels · Reduce colors · Web-safe colors · 16-color palette · Duotone · Silhouette · Rainbow tint · Tint with a color · HSL lightness · Color channel images · Apply external mask
Channel sheets show sRGB values, not ICC print proofs. HCL is reordered CIELCh and YCbCr is full-range BT.601. External masks must match image dimensions; choose alpha or luminance and replace or multiply.
How to use
- Choose the operation that matches your task. Import a file, try the example, or enter text for generation and Base64 decoding.
- Adjust the visible settings and create a preview. The original remains available. Changing settings disables the old download until you run again.
- Inspect the result, details and dimensions. Copy text when available or download the file. Use the alternate download for PNG, extracted frames or a second representation.
Limits and common errors
Color keys do not identify people or objects. Similar foreground colors may disappear. Alpha masks show transparency as black-to-white intensity; channel reordering changes colors. Palette reduction approximates colors and can lose subtle gradients.
PNG, JPEG, static WebP or BMP. 40 MiB/file, 24 MP, 8192 px/side; pixel operations 6 MP. GIF: 120 frames and 24 MP across all frames. Split: at most 256 pieces.
Image exports re-encode pixels; Base64 encode/decode preserves original bytes. BMP 1/4/8/16-bit and GIF reduce colors. BMP 4/8-bit palettes use up to 8/128 colors. JPEG fills transparency.
Questions and answers
How does this operation work?
A raster pixel stores red, green, blue and often an alpha value. Alpha zero means fully transparent; 255 means opaque. Color-key removal compares RGB distance to the selected color. Tolerance expands the matching range, while a soft edge fades the transition.
What should I check before exporting?
Color keys do not identify people or objects. Similar foreground colors may disappear. Alpha masks show transparency as black-to-white intensity; channel reordering changes colors. Palette reduction approximates colors and can lose subtle gradients.
Does this upload my files?
No. Processing runs in this tab. Closing the page discards its working state.