ToolGrid AIImage Brightness Adjuster
Lighten or darken photos and export PNG copies.
Runs entirely in your browser — your selected files are not uploaded by this tool. Device-provided speech voices may use online services.
About this free image brightness adjuster tool
Lighten or darken photos and export PNG copies. Image tools prepare photos, screenshots and graphics for a specific destination. Pixel dimensions, aspect ratio, transparency and file format are separate decisions. Work from an original, inspect the exported image at its real display size and check that the destination accepts the output format before processing a large batch.
A practical example
Use 110% to lighten an image or 80% to darken it, then inspect highlights and shadow detail.
Before you rely on the result
Brightness cannot recover clipped detail. The adjustment applies uniformly and outputs PNG, not a camera RAW file.