Render Detector
by _Vision_
Render Detector is a Fabric utility for 1.20.1 that scans installed mods for legacy rendering code and reports where it appears.
What it does
The tool reads the JAR files of loaded mods and checks each file against a set of patterns that match older OpenGL usage. Different files are checked for different patterns, and the results are shown in a clean GUI with quick visual checks. A modder can then generate a text report in txt, json or csv format for later examination, or copy a one-line summary to the clipboard.
Render Detector is aimed at modders who want to see where their code depends on older GL features before deciding on maintenance or refactoring. Minecraft's rendering system has changed over time, and many mods still use older methods in parts of their code, so the scan is meant to locate those spots.
The mod is Client-side only and is released under the Apache License 2.0; it is not open source. Its only published file is 0.1.0 for 1.20.1, released on the beta channel on 2026-02-23. No required dependency is listed for Fabric.
Key features
Mod JAR scanning
Reads the JAR files of loaded mods and scans each one for legacy rendering patterns.
Visual results screen
Displays findings in a sleek GUI, with quick visual checks of each mod's results.
Report export
Writes the findings as a text report in txt, json or csv format for later examination.
One-line clipboard summary
Copies a very short one-line report to the clipboard for pasting elsewhere.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Mod developers and maintainers who want a diagnostic view of legacy rendering code in their own or other mods. Players who only play the game have no use for the scan.
How it compares
F3 Screenshot is a Fabric client mod for 1.20 – 26.1.2 under the MIT License and is open source, so it fits a different purpose than scanning code. Gamemode Detector is a Fabric client mod for 1.19 – 1.20.1, also MIT licensed and open source. Render Detector shares the client-only environment of both but is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Render Detector | Fabric | 1.20.1 | Client-side only | 2026-02-23 |
| F3 Screenshot | Fabric | 1.20 – 26.1.2 | Client-side only | 2026-05-05 |
| Gamemode Detector | Fabric | 1.19 – 1.20.1 | Client-side only | 2023-06-25 |
Questions
Does Render Detector need Fabric API?
Which Minecraft version does Render Detector support?
Does Render Detector have to be installed on the server?
Is the scan perfect?
In the catalog
Render Detector is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 34,764 mods support Minecraft 1.20.1.
More from _Vision_
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What the author says
It helps modders understand where their code relies on older GL features so they can make informed decisions about maintenance or refactoring. What Render Detector does: - Scans and inspects every mod - Displays results in a clean GUI for quick visual checks - Can generate a text report for further review - The text…
Official listing
- Modrinth page
- modrinth.com/mod/render-detector
- Owner
- _Vision_
- Published
- 2026-02-23
- Updated on Modrinth
- 2026-02-23
- Facts verified
- 2026-10-15