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LibreSprite online: the browser version

There is an official LibreSprite you can run in a web browser, with no install. It is an older development build, and it forgets your files when you close the tab. Here is what we found when we drew, saved and downloaded a sprite with it.

Checked with LibreSprite 1.3Updated 3 min read
On this page 6 sections
  1. What we tested
  2. How to keep your work
  3. Requirements and limits
  4. Running a newer web build yourself
  5. Other pixel-art editors that run online
  6. FAQ

Short answer

Is there a LibreSprite web version?

Yes: libresprite.github.io/online runs the real program, compiled for the browser. It is a 1.2-dev build (older than the current 1.3), downloads about 30 MB on first load, and keeps files only until you reload or close the page. Use File → Share to download your work. For regular use, install the desktop app; it is free and much more reliable.

The browser version at libresprite.github.io/online/: the familiar Home tab, with “LibreSprite 1.2-dev” in the footer.
Real screenshot · Chromium (headless, Linux) · LibreSprite web build “1.2-dev” at libresprite.github.io/onlineThe browser version at libresprite.github.io/online/: the familiar Home tab, with “LibreSprite 1.2-dev” in the footer.Playwright 1280×800 · taken 2026-11-01

What we tested

StepResult
Open the page (Chromium)works It reloads itself once (to enable the features it needs), downloads ~30 MB and shows the Home tab after about 20 seconds.
New sprite, draw with the Pencil, zoomworks Same interface and shortcuts as the desktop app.
Save (Ctrl+S)in the browser only Saves into a virtual folder called web_user, inside the page, not on your computer.
File → Share…works Downloads the saved file to your computer: our 32 × 32 PNG arrived intact.
Reload the page, File → Openfiles gone The web_user folder was empty again.
Open a file from your computernot found The Open dialog only shows the browser’s virtual folder; we found no upload option.
In the browser version, File → Share… is enabled: it downloads the saved file to your computer.
Real screenshot · Chromium (headless, Linux) · LibreSprite web build “1.2-dev” at libresprite.github.io/onlineIn the browser version, File → Share… is enabled: it downloads the saved file to your computer.Playwright 1280×800 · taken 2026-11-01
After reloading the page, the web_user folder is empty: files saved in the browser are gone.
Real screenshot · Chromium (headless, Linux) · LibreSprite web build “1.2-dev” at libresprite.github.io/onlineAfter reloading the page, the web_user folder is empty: files saved in the browser are gone.Playwright 1280×800 · taken 2026-11-01

How to keep your work

  1. Save inside the page

    Ctrl+S, type a name with the format you want (walk.ase keeps layers and frames, walk.png or walk.gif for sharing), OK.

  2. Download it

    File → Share…. Your browser downloads the file. Do this for every file you want to keep, before closing or reloading the tab.

  3. Continue on the desktop app

    The downloaded .ase opens in the installed LibreSprite on Windows, macOS or Linux.

Requirements and limits

  • A desktop browser with WebGL and WebAssembly threads (current Chrome, Edge, Firefox or Safari). The page sets itself up with a service worker on the first visit.
  • It is not the current version: features and fixes from 1.3 (new symmetry modes, pixel-art line snapping and others) are missing. See releases.
  • Keyboard shortcuts that the browser itself uses (Ctrl+W, Ctrl+T, Ctrl+N in some browsers) may be taken by the browser instead of LibreSprite.
  • On phones and tablets the interface is tiny and expects a mouse and keyboard; Android users are better served by the APK.

Running a newer web build yourself

LibreSprite’s source has an emscripten folder for the browser build, and the development branch added an automated web build on 11 October 2026. The 1.3 release itself ships no web build. If you build one, serve it from a web server that sends the cross-origin isolation headers (COOP and COEP) or uses a service worker as the official page does. Opening the HTML file directly from disk will not work.

Other pixel-art editors that run online

EditorWhy consider it
PiskelFree and open source, made for the browser, simple animation with live preview and GIF export.
PixeloramaFree and open source (MIT), with a web version as well as desktop builds; layers and animation.

A full comparison is on the best free pixel-art software.

FAQ

Is LibreSprite online free?

Yes, like the desktop app. It runs on the LibreSprite project’s GitHub Pages site; no account needed.

Where are my files in LibreSprite online?

In a virtual folder inside the page (web_user). They disappear when you reload or close it, so download them with File → Share.

Can I use LibreSprite on a Chromebook without installing?

Yes, through the web version, with the limits above. Installing the Linux version on a Chromebook works better: Chromebook options.

Does it work offline?

Not reliably: it needs to download its 30 MB the first time, and nothing you save in it is kept.

Keep going

DownloadOfficial files only, with sizes, SHA-256 hashes and the one you need.Android, iPad & ChromebookThe official APK, what works on tablets, and the iPad answer.Best free pixel art softwareLibreSprite, Pixelorama, Piskel and more, tested on one task.

Found something wrong or out of date? Tell us: hello@libresprite.dev. We fix mistakes within a day.