SonLVL

Free plan LinuxMacWindows

What SonLVL is

SonLVL is a level-project editor in a public Sonic Retro repository, which contains tools and disassemblies made by its members. The editor provides controls for opening, saving, undoing, and redoing projects, with Objects, Foreground, Background, and Art tabs. Users can select, move, create, delete, copy, and paste objects and ring groups. Layout editing supports drawing with chunks, selecting areas, and toggling the Sonic 1 loop flag. Chunk and block controls include rearranging, swapping, flipping, solidity, priority, palette, and tile-index changes. Collision displays can be disabled or show paths and angle values, and a Sonic CD control displays objects across time zones. The repository includes configurations for Sonic 1, Sonic 2, Sonic 3K, Sonic CD PC, and Sonic & Knuckles Collection. The project is primarily C# and has Linux, macOS, and Windows listed. Its Snapshot-2026.14 release is temporary while an automated build system is put in place, and includes a 703 KB SonLVL ZIP and source archives.

Who it suits

It suits people editing 2D Sonic level projects who need object, layout, chunk, block, and collision-view controls. The listed game configurations include several Sonic titles and collections.

What it does well

Includes object, foreground, background, and art editing tabs.
Supports editing objects and ring groups.
Provides chunk and block editing controls.
Includes configurations for several Sonic games.
Free release includes source code archives.

What to know first

Snapshot release is described as temporary.
Release is pending an automated build system.
Unhandled exceptions write an error log.

Getting started

Open the SonLVL repository on GitHub.
Choose a platform listed for the software: Linux, macOS, or Windows.
Get SonLVL.zip from the Snapshot-2026.14 release; the asset is listed at 703 KB.
Use the release’s source code ZIP or tar.gz archive if you need the source.

Verdict

SonLVL offers detailed level-project editing controls alongside configurations for several Sonic games. Readers should note that the available snapshot is explicitly temporary while automated builds are prepared.

Questions

How much does SonLVL cost?

SonLVL is free, with a free plan.

Which platforms does SonLVL support?

The listed platforms are Linux, macOS, and Windows.

Which games have configurations?

The INI Files directory includes Sonic 1, Sonic 2, Sonic 3K, Sonic CD PC, and Sonic & Knuckles Collection.

Can I get the source code?

Yes. The latest release provides source code in ZIP and tar.gz formats.

What does the latest release include?

Snapshot-2026.14 includes SonLVL.zip, listed at 703 KB, plus separate ZIP downloads for related tools. It is described as a temporary snapshot.

Who maintains SonLVL?

It is in the public Sonic Retro repository. Sonic Retro describes its organization as a collection of tools and disassemblies made by its members.

Facts from SonLVL's own pages

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

Where SonLVL stands on Freedom251

Game Level Editors#24 of 28