Image Opacity Adjustment Tool

Adjust image transparency, supporting solid and gradient transparency effects, optional area processing, and batch operations.

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

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Select images, set opacity options, then process and download the result. Supports single and batch images. The UI previews only the first 20 files; all files are processed. Batch results can be downloaded as a ZIP.

Local processing Area Select Gradient Transparency Savable settings

Select Images

Select multiple images at once. After selecting, go to settings, then click Process to generate results.

Click to choose images, or drag them here Supports common formats like PNG, JPG, JPEG, WebP, BMP, GIF. Animated GIFs are processed using the first frame.

File list No files selected

After selecting images, the first 20 file names and thumbnails will appear here.

Set Opacity

Set the mode, area, and output format first, then process and download. For a single image, drag on the preview to select an area.

Transparency ModeSolid for uniform transparency, gradient for fade effects

Solid Opacity Gradient Opacity

Opacity

0% is fully transparent, 100% is fully opaque.

Alpha Processing

Processing areaBatch processing applies the same area ratio to each image

Entire image Selected area

Keep existing transparent areas Auto-update preview after setting

Output settingsUse PNG or WebP for transparency

Output format

WebP quality

Process & download

Confirm the settings to start. Download a single image directly; multiple images will be saved as a ZIP.

ProgressWaiting

Select images and set options, then click Start.

Result previewNo results yet

After processing, the first 20 results are shown. Downloads include all results.

Instructions

Software Usage Instructions

Select image files: Click the “Select Image” area to upload the image whose transparency you want to adjust, or click “Load Example” to quickly preview the effect. Common image formats such as PNG, JPG, JPEG, WebP, BMP, and GIF are supported.
Set transparency mode:
- Solid opacity: Apply a uniform opacity value to the processed area, suitable for creating semi-transparent watermarks, overlay images, and faded background images.
- Gradient opacity: Make opacity change gradually by direction. Linear and radial gradients are supported, allowing effects such as edge fade-out, center emphasis, and circular fading.
Adjust opacity parameters: Set opacity from 0% to 100% using the slider or input box. 0% means fully transparent, and 100% means fully opaque. In gradient mode, you can set the start and end opacity separately.
Select processing area:
- Entire image: Apply the opacity effect to the entire image.
- Selected area: Drag on the preview image to draw a rectangular selection, or manually enter the X coordinate, Y coordinate, width, and height.
Configure output options: Choose PNG or WebP for export. PNG is recommended when you need to preserve the alpha channel; choose WebP and adjust quality when you need a smaller file size.
Preview and process: Click “Preview Effect” to view the current parameter effect. After confirming, proceed to the “Process & Download” step and click “Start Processing” to generate the result.
Batch download: When uploading multiple images, the interface only displays the first 20 files for review, but all images will be processed. After processing is complete, click “Download All Results ZIP” to save all results.
Save settings: Click “Save Settings” to keep frequently used opacity parameters, making it easier to reuse the same configuration next time.

Frequently Asked Questions

A: Solid opacity applies the same opacity value to the processed area, making it suitable for uniformly fading an image; gradient opacity changes gradually based on position, making it suitable for edge fade-out, directional fading, and center focus effects.

A: PNG supports an alpha channel, making it suitable for saving semi-transparent images, transparent background assets, and partial transparency effects. JPG does not support an alpha channel, so processed results need to be saved in a format that supports transparency information, such as PNG or WebP.

A: In “Processing Area,” select “Selected Area,” then drag on the preview image to draw a rectangular area. You can also manually enter the X coordinate, Y coordinate, width, and height. Image content outside the selection will remain unchanged.

A: When enabled, pixels that were originally completely transparent will remain transparent and will not be overwritten by the new transparency settings. When processing PNG assets with transparent backgrounds, it is recommended to keep this option enabled.

A: Batch processing will try to keep the original file names and generate the corresponding extension based on the output format. If duplicate file names are encountered, a number will be automatically added to the file name to prevent results from overwriting each other.

A: WebP supports transparency channels. The quality setting mainly affects the clarity and file size of the compressed image. The higher the value, the more image detail is preserved, and the file size is usually larger.