PackPix (Full) — Dense Packing, JSON Atlas & Batch ZIP

PNG frames in. Sprite sheet out.

PackPix takes a batch of PNG frames — an animation you exported frame by frame, a set of icons, a texture atlas from an old project — and packs them into a clean sprite sheet, entirely inside your browser. Drop the files, pick a layout, watch the live preview, export a PNG. No install. No account. No upload. No internet after download.

This is the full version — MaxRects dense packing, trim, rotation, JSON atlas, batch ZIP and all 16 presets, unlocked forever. (Looking for the free edition? Try PackPix Free — 3 layouts, PNG export, 6 presets.)

What you get

• MaxRects dense packing — best-short-side-fit bin packing that squeezes mixed-size frames tight
• Trim + 90° rotation — cut transparent margins and rotate frames for denser sheets
• Power-of-two & max size — 128–2048 cap with POT output for older engines and GPUs
• JSON atlas — TexturePacker-style frames/meta: trimmed, rotated, spriteSourceSize, sourceSize
• Custom frame names — prefix + zero padding for engine-ready naming
• Batch ZIP — sheet.png + atlas.json + manifest.txt in one click
• All 16 layouts & presets — Shelf, MaxRects, Grid, Strip →, Strip ↓, Canvas with Default, Tight, Neat, Animation Strip, Grid 4/8, Dense MaxRects, Rotate + Pack, Power of Two, Big Sheet 2048, Vertical Strip, Canvas 512, Unity Ready, Godot Ready, Phaser 3, RPG Maker Grid
• English & Japanese UI

Free vs Full

Free: Shelf/Grid/Strip layouts, gap padding, live preview, PNG export, 6 presets.
Full (this page): everything above, one-time $5, no subscriptions.

100% offline by design

PackPix contains zero network code. Your PNGs are read and packed with the Canvas API inside your tab — nothing is uploaded, nothing is recorded, no telemetry. It keeps working forever, even offline, from a single HTML file. Double-click, done.

Requirements

Any modern browser (Chrome, Edge, Firefox, Safari). Works on Windows, macOS, Linux.

You own your sprites

Exported sheets are 100% yours — use them in commercial projects, free of royalties. The software itself is licensed (no redistribution of the tool). See LICENSE.txt inside the ZIP.

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PixCrunch — offline image compressor & resizer: batch shrink screenshots and store images to PNG, JPEG or WebP before you upload them. Free edition (10 files per batch) + Full ($5, unlimited batches + target size).

Updates included. Refunds follow itch.io policy.