IrfanView for the browser. A complete image editor in a single HTML file.

No install. No upload. Nothing leaves your device.

▶️ Try it → slate.naklitechie.com    📖 Guide → slate.naklitechie.com/guide/

• Selection tools: crop, redact (solid black box), blur, pixelate
• Annotation tools (live layers): text, arrow, freehand pencil, shapes (rectangle / oval / line)
• Layers panel — every annotation is editable: reorder, hide, delete. Survives undo across destructive transforms.
• Eyedropper — pick any pixel's colour from the canvas; copies to clipboard and applies to all drawing tools. Recent-colour swatches shown next to every colour picker.
• Transforms: rotate (90° CW / CCW / 180°), flip (H / V), straighten (fine angle, expanding canvas), resize
• Adjustments: brightness, contrast, saturation (WebGPU fast path, ~5× on 12 MP images), sharpen
• Lossless JPEG rotate via EXIF orientation flip — zero re-encode, zero quality loss

• Zoom (wheel + pinch), pan, fit modes (window / width / height / 1:1 / fill)
• Fullscreen, ruler overlay, pixel grid at high zoom
• Album mode: open a folder, navigate with arrow keys, thumbnail strip
• Slideshow with timer / transitions / shuffle

• Open: file picker (FSA), folder picker (FSA), drag-drop, clipboard paste
• Save: smart Ctrl+S (workspace-folder sidecar / overwrite / download), timestamped filenames
• Workspace folder — pick once, every save lands there

• Read: JPG, PNG, WebP, GIF (first frame), AVIF, SVG, BMP, HEIC, HEIF, TIFF, JPEG-XL, PSD, TGA, DDS, RAW (CR2, NEF, ARW, DNG, RAF, ORF — via embedded JPEG preview)
• Write: PNG, JPEG, WebP, TIFF
• EXIF: displayed on open with GPS warning, stripped on save by default (toggle)

• Batch operations — convert / resize / rotate / flip / rename across a folder, with worker pool, dry-run, progress bar, cancel
• Contact sheet / gallery export — one-click HTML gallery or grid PNG of a folder

• Session restore — reload the page, click Resume, your image and edits come back
• Undo / redo 50 steps with periodic snapshots
• 5-tab Help modal (? key)

Nothing leaves your browser. Slate makes no network requests for editing — pixels never go anywhere.

A handful of niche format decoders (HEIC, JPEG-XL, PSD, TIFF) lazy-load the first time you open such a file, from esm.sh with exact version pins. The smaller libraries (TGA, DDS) are vendored directly into the bundle with SHA-256 content hashes in SECURITY.md. No accounts, no telemetry, no analytics beacon.

It's one HTML file. Save index.html to disk, open it in a browser. That's it. No build step, no dev server needed.

For development of the source modules (under src/, gitignored), use any static server like python3 -m http.server and run node build/inline.mjs to rebuild the single-file output.

• A cloud editor — there's no server, nothing syncs anywhere, nothing uploads
• A Photoshop replacement — no curves, masks, layer groups, blend modes (yet)
• A multi-file project tool — Slate edits one image at a time; folder operations (slideshow, batch, gallery) work across many but each transform is per-file
• A backup service — your edits live in IndexedDB until you save; nothing protects you from clearing browser data

Slate uses these libraries, lazy-loaded only when you open the matching format:

Everything else is vanilla browser APIs — Canvas 2D, OffscreenCanvas, FileSystemAccess, IndexedDB, Web Workers, WebGPU.

Coloured with iran-10 · شب یلدا SHAB-E YALDA — Persian winter solstice, 7000 years pre-Zoroastrian; the night of staying awake till dawn with Hafez and pomegranate. Aubergine body, saffron ink, royal-blue active accent, pomegranate alerts. Both dark (default) and light (warm parchment companion) themes retuned.

Palette pulled from Rangrez, the global colour-palette library that backs all NakliTechie projects.

More browser-native, local-first apps at naklitechie.github.io →

github.com/NakliTechie/slate/issues

MIT