- Backend: POST /api/image/replace-subject Uses rembg to extract the subject from a source photo, scales it to fit the selection mask bounding box (or canvas centre when no selection is active), applies a partial LAB color transfer (blend=0.45) so the subject's lighting matches the background, then composites the result. Also adds POST /api/image/extract-subject for standalone subject extraction. - Frontend: "Replace with subject from file" button in the selection panel (selection_actions.js) — opens a native file picker so no clipboard API or HTTPS is required. Calls the new endpoint with the current SAM mask. - Frontend: Image > Replace Subject (AI)... menu entry backed by modules/image/replace_subject.js — a full dialog with file picker, thumbnail preview, and "match background lighting" toggle. Works with or without a prior Smart Select; if a selection exists it confines the subject to that region. https://claude.ai/code/session_01UtrvbisMp1yGu6PqeLmrFr
miniPaint
Online image editor lets you create and edit images using HTML5 technologies. No need to buy, download, install, or have outdated flash. No ads. Key features: layers, filters, open source Photoshop alternative.
miniPaint operates directly in the browser. You can create images by pasting from the clipboard (ctrl+v) or uploading from the computer (using menu or drag & drop). Nothing will be sent to any server. Everything stays in your browser.
URL:
https://viliusle.github.io/miniPaint/
Preview:
Change log: /miniPaint/releases
Browser Support
- Chrome
- Firefox
- Opera
- Edge
- Safari
- Yandex
Features
Files: open images, directories, URLs, data URLs, drag and drop, save (PNG, JPG, BMP, WEBP, animated GIF, TIFF, JSON (layers data), print.
Edit: undo, cut, copy, paste, selection, paste from the clipboard.
Image: information, EXIF, trim, zoom, resize (Hermite resample, default resize), rotate, flip, color corrections (brightness, contrast, hue, saturation, luminance), automatic color adjustment, grid, histogram, negative.
Layers: multi-layer system, differences, merging, flattening, transparency support.
Effects: black and white, blur (box, gaussian, stack, zoom), bulge/pinch, denoise, desaturation, dither, dot screen, edge, emboss, enrich, gamma, grains, grayscale, heatmap, jpg compression, mosaic, oil, sepia, sharpen, solarize, tilt shift, vignette, vibrance, vintage, blueprint, night vision, pencil, also instagram filters: 1977, aden, clarendon, gingham, inkwell, lo-fi, toaster, valencia, x-pro ii.
Tools: pencil, brush, magic wand, eraser, fill, color picker, letter, crop, blur, sharpener, desaturation, clone, borders, sprites, keypoints, color zoom, change color, restore transparency, content fill.
Help: keyboard shortcuts, translation.
Embed
To embed this app on another page, use the following HTML code:
<iframe style="box-sizing:border-box; width:100%; height:100vh;" id="miniPaint" src="https://viliusle.github.io/miniPaint/" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
Build instructions
Wiki
See Wiki
Contributors
License
MIT License
Support
Please use the GitHub issues for support, feature requests and bug reports, or contact us by sending an email to www.viliusl@gmail.com.
