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SonLVL

github.com

WindowsmacOSLinux
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Spec score 7.3 #21 of 28 in Game Level Editors

What it is

SonLVL is a level-project editor in a public Sonic Retro repository of tools and disassemblies. Its interface has Objects, Foreground, Background and Art tabs, with controls to open, save, undo and redo project changes. Object editing includes selecting, moving, creating, deleting, copying and pasting objects and ring groups. Users can draw level layouts with chunks, select areas and toggle the Sonic 1 loop flag. Chunk and block tools cover rearranging, swapping and flipping, along with solidity, priority, palette and tile-index changes. Collision views can be disabled or set to show paths and angle values, and a Sonic CD control can display objects from all time zones. The INI Files directory includes configurations for Sonic 1, Sonic 2, Sonic 3K, Sonic CD PC and Sonic & Knuckles Collection. The repository is written primarily in C# and lists Linux, macOS and Windows. Snapshot-2026.14 is identified as temporary until an automated build system is in place. It includes a 703 KB SonLVL ZIP and source archives; an unhandled exception creates SonLVL.log.

Spec sheet

Purpose
SonLVL is a public Sonic Retro repository named SonLVL.Read 30 Sep 2026 · github.com
Maker
Sonic Retro describes itself as a collection of tools and disassemblies made by its members.Read 30 Sep 2026 · github.com
block editing
Block editing supports reordering, swapping, horizontal or vertical flipping, priority, palette and tile-index changes.Read 1 Oct 2026 · github.com
Build status
The release notes say the snapshot is provided until the automated build system is put in place.Read 30 Sep 2026 · github.com
chunk editing
Chunk editing supports reordering, swapping, flipping, solidity changes and block index changes.Read 1 Oct 2026 · github.com
collision views
The editor can disable collision viewing, show collision paths 1 and 2, and display angle values.Read 1 Oct 2026 · github.com
Community
The repository page lists 81 stars, 29 forks, and 82 issues.Read 30 Sep 2026 · github.com
download release
The Snapshot-2026.14 release includes a SonLVL.zip asset listed at 703 KB.Read 1 Oct 2026 · github.com
Downloads
The latest release includes SonLVL.zip at 703 KB plus separate ZIP downloads for related tools.Read 30 Sep 2026 · github.com
editing tabs
The interface includes Objects, Foreground, Background and Art tabs.Read 1 Oct 2026 · github.com
editor function
SonLVL provides controls for opening, saving, undoing and redoing level projects.Read 1 Oct 2026 · github.com
Error handling
The application writes an error log named SonLVL.log when an unhandled exception occurs.Read 30 Sep 2026 · github.com
Game configurations
The INI Files directory includes configurations for Sonic 1, Sonic 2, Sonic 3K, Sonic CD PC, and Sonic & Knuckles Collection.Read 30 Sep 2026 · github.com
Included tools
The repository contains SonLVL alongside LevelConverter, SonAni, SonPLN, S1SSEdit, S3SSEdit, SpritePlotter.NET, and other tools.Read 30 Sep 2026 · github.com
Interface technology
SonLVL's program entry point uses Windows Forms.Read 30 Sep 2026 · github.com
Language
GitHub identifies the SonLVL repository's primary language as C#.Read 30 Sep 2026 · github.com
Latest release
Snapshot-2026.14 is described as a temporary snapshot of SonLVL as of July 14, 2026.Read 30 Sep 2026 · github.com
level layout editing
Users can draw levels with chunks, select areas and toggle the Sonic 1 loop flag.Read 1 Oct 2026 · github.com
maker organization
Sonic Retro describes its GitHub organization as a collection of tools and disassemblies by Sonic Retro members.Read 1 Oct 2026 · github.com
object editing
Users can select, move, create, delete, copy and paste objects and ring groups.Read 1 Oct 2026 · github.com
release security
The Snapshot-2026.14 commit was created on GitHub.com and has a verified GitHub signature.Read 1 Oct 2026 · github.com
release status
Snapshot-2026.14 is described as a temporary release until the automated build system is put in place.Read 1 Oct 2026 · github.com
Release verification
GitHub marks the latest release commit as created on GitHub.com and signed with GitHub's verified signature.Read 30 Sep 2026 · github.com
Repository activity
The repository page lists 760 commits.Read 30 Sep 2026 · github.com
repository status
SonLVL is a public GitHub repository maintained in C# with 760 commits shown on its repository page.Read 1 Oct 2026 · github.com
Runtime detection
The source detects the Mono runtime and checks for Windows, macOS, Unix, and Xbox platforms.Read 30 Sep 2026 · github.com
Sonic CD support
A control toggles viewing objects from all time zones for Sonic CD.Read 1 Oct 2026 · github.com
source availability
The release provides source code in both zip and tar.gz archives.Read 1 Oct 2026 · github.com
support channel
The repository exposes a GitHub Issues tracker, which shows 82 issues on the repository page.Read 1 Oct 2026 · github.com

Strong points and limits

Strong points

  • Provides object, chunk and block editing controls
  • Includes configurations for five listed Sonic game variants
  • Collision views can show paths and angle values
  • Source code is available in ZIP and tar.gz formats

Limits

  • Snapshot-2026.14 is described as a temporary release
  • Automated build system is not yet in place
  • Interface entry point uses Windows Forms

Who it suits

SonLVL suits people editing level projects for the listed Sonic games, particularly those who need object, chunk, block and collision controls. Its public repository and source archives may suit users comfortable working with code or community-maintained tools.

Verdict

SonLVL offers detailed controls for Sonic level-project editing across objects, layouts and art. Its latest listed snapshot is temporary, so note the release status before relying on it.

Where Specifiction places it

Alternatives to SonLVLAll alternatives →