Myrling Sprite Editor

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What Myrling Sprite Editor is

Myrling Sprite Editor is a free, open-source pixel editor for game creatures, built for Realms of Eldermyr. The browser editor runs without a build, server or installation, and a hosted version can be opened without downloading anything. It opens PNG files and exports PNGs; Chrome, Edge and the Mac app can save edits back over opened files. Drawing tools include pencil, eraser, fill, line, square, spray, colour pick and selection. It supports multiple sprite frames, onion skin and playback previews, along with grid-based tilesheets that can be split into sprites by row or cell. Open work is saved in the browser after each change and restored on a later visit, though undo history is not retained. Drawings stay on the user's machine except when the optional PixelLab generator is used; that feature requires the user's API key and sends it to PixelLab when Generate is pressed. Images over 4096 pixels on a side are refused, and sprites above about one million pixels are not kept in browser storage between visits. The Mac app runs on macOS 11.3 or later on Apple silicon and Intel.

Who it suits

Myrling suits pixel-art creators working on sprites, animation frames or grid-based tilesheets who use a browser or supported Mac. The optional PixelLab generator is for users with a PixelLab API key.

What it does well

Browser editor needs no installation or server
Includes multiple frames, onion skin and previews
Can split tilesheets into sprites by row or cell
Open work is saved in the browser after changes
Mac app verifies updates with a signature and hash

What to know first

Images over 4096 pixels on a side are refused
Sprites above about one million pixels are not retained between visits
Browser storage does not retain undo history
PixelLab generation requires the user's API key

Limits

The free editor refuses images larger than 4096 pixels on a side, and sprites above about one million pixels are not retained in browser storage. Browser-restored work does not retain undo history. Optional PixelLab generation requires the user's API key and uses PixelLab credits.

Plans

Plan	Billed and limits	Price
Myrling Sprite Editor	MIT licensed · web editor and macOS app	Free

As josiah-turnquist.github.io lists them, read 12 Oct 2026. The maker's own page has the final word.

Getting started

Open the hosted browser editor at https://josiah-turnquist.github.io/myrling-sprite-editor/editor.html without downloading it.
Open a PNG file or start drawing with the editor's tools.
Use the timeline and animation previews for multi-frame sprites, or split a grid-based tilesheet by row or cell.
Save or export the finished sprite as a PNG; Chrome, Edge, and the Mac app can save edits over opened files.
For native Mac use, install the app on macOS 11.3 or later on Apple silicon or Intel.

Verdict

Myrling offers pixel drawing, animation and tilesheet tools in a free browser editor and Mac app. Keep its image-size and browser-storage limits in mind, and note that PixelLab generation is optional and uses the user's key.

Questions

Does Myrling Sprite Editor cost anything?

The listed plan is free, and the project is MIT licensed.

Which platforms does it support?

It supports web and macOS. The native Mac app runs on macOS 11.3 or later on Apple silicon and Intel.

Can it edit and export PNG files?

Yes. It opens PNGs and exports PNGs; Chrome, Edge, and the Mac app can save changes over opened files.

Does it support sprite animation?

Yes. It supports multiple sprite frames, onion skinning, an animation timeline, and playback previews.

Does it use PixelLab?

An optional generator uses the user's PixelLab API key and spends PixelLab credits. When Generate is pressed, the key is sent to api.pixellab.ai.

Where is work saved, and does undo history persist?

Open work is saved in the browser after each change and restored on a later visit. Undo history is not retained.

Facts from Myrling Sprite Editor's own pages

Animation: Users can add, copy, delete, and reorder frames, view onion skinning, and play frames as an animation. · github.com, 12 Oct 2026
Browser access: The maker provides a hosted browser editor that can be tried without downloading anything. · github.com, 12 Oct 2026
Browser editor: The editor runs in a browser without a build, server, or installation. · github.com, 11 Oct 2026
Browser limits: Images over 4096 pixels on a side are refused, and sprites over about one million pixels are not kept in browser storage between visits. · github.com, 11 Oct 2026
Drawing tools: The editor includes pencil, eraser, fill, line, square, spray, color picking, selection, palette, zoom, undo, and redo tools. · github.com, 12 Oct 2026
Integration: An optional PixelLab generator uses the user's PixelLab API key and spends PixelLab credits for generated images. · github.com, 11 Oct 2026
Integrations: An optional PixelLab generator requires the user's PixelLab API key and sends it to api.pixellab.ai when Generate is pressed. · github.com, 12 Oct 2026
License: The editor is MIT licensed, and the maker invites users to fork and ship their own creatures with it. · github.com, 12 Oct 2026
Limits: Images larger than 4096 pixels on a side are refused, and sprites above about one million pixels are not retained in browser storage. · github.com, 12 Oct 2026
Local persistence: Open work is saved in the browser after each change and restored on a later visit, but undo history is not retained. · github.com, 12 Oct 2026
Mac support: The native Mac app supports macOS 11.3 or later on Apple silicon and Intel Macs, and its releases are signed with an Apple Developer ID and notarised by Apple. · github.com, 12 Oct 2026
PNG editing: It opens PNG files and can save edits back over the files in Chrome, Edge, and the Mac app. · github.com, 11 Oct 2026
PNG workflow: Users can open and export PNGs, and Chrome, Edge, and the Mac app can save edits back to opened files. · github.com, 12 Oct 2026
Privacy: The maker says drawings stay on the user's machine; a text prompt is sent only when the optional PixelLab generator is used. · github.com, 11 Oct 2026
Purpose: Myrling is a pixel editor for game creatures, originally made for Realms of Eldermyr. · github.com, 12 Oct 2026
Runs locally: The editor runs as a standalone HTML file without a build, server, or installation, and says drawings stay on the user's machine except for an optional PixelLab prompt. · github.com, 12 Oct 2026
Security: The Mac app verifies downloaded editor updates using an Ed25519 signature and SHA-256 hash before keeping them. · github.com, 12 Oct 2026
Tilesheets: The editor supports drawing on tilesheets and splitting sheets into sprites by row or cell. · github.com, 12 Oct 2026
Update security: The Mac app verifies downloaded editor updates with an Ed25519 signature and SHA-256 hash before keeping them. · github.com, 11 Oct 2026

Where Myrling Sprite Editor stands on Freedom251

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