LucadenFree online toolsBrowse toolsPrivate image effect
Lighten or darken image pixels with a precise negative-to-positive brightness control and lossless PNG export.
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How it works
Important
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
Lighten or darken image pixels with a precise negative-to-positive brightness control and lossless PNG export.
Large changes can clip shadow or highlight detail. Check skin tones, gradients, and flat colors at full size before using the result.
Lucaden adds a focused workflow, conservative memory limits, before-and-after preview, privacy checks, and exact attribution.
Questions
No. Browser Canvas decodes and exports the image in memory, while the pinned Jimp effect modules change its pixels locally.
Large changes can clip shadow or highlight detail. Check skin tones, gradients, and flat colors at full size before using the result.
Jimp 1.6.1 (MIT) performs the deterministic pixel operation; the browser's Canvas API performs PNG export. The upstream project retains its name, copyright, and license.
Open-source foundations
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.