01
Check the GLB container
Verify the binary magic header, container version, declared file length, and chunk boundaries.
Free 3D Tool
GLB Validator
Check a GLB file online for common structural problems before you preview, convert, or hand it off.
Free to useBrowser-basedNo credits required
Local browser tool
GLB file
Files stay in this browser session. This tool does not use account credits.
Structural report
Choose a file on the left to begin. Your result will appear here without a server upload.
About this tool
Run a fast first-pass check on a GLB file
A GLB can have the right file extension and still contain a truncated binary buffer, an unreadable JSON chunk, or references that extend beyond the embedded data. Catching those problems early can save time when a model is moving between generators, DCC tools, engines, and web viewers.
This free GLB validator checks the binary container, glTF 2.0 asset version, JSON chunk, and common buffer bounds locally in your browser. It is designed as a practical first check, not as a replacement for the complete Khronos glTF Validator.
02
Catch common buffer problems
Check whether embedded buffers and buffer views stay within the binary data available in the file.
03
Keep the file local
The report is generated in the browser, so the free check does not require an upload or account.
Built for real 3D workflows
Who uses GLB Validator?
3D pipeline teams
Run a quick handoff check before an asset moves between modeling, engine, and web workflows.
AI 3D creators
Check a generated GLB before previewing it, converting it, or sending it to another tool.
Web and AR developers
Catch basic packaging problems before a model is loaded into a real-time viewer or product page.
How it works
Use GLB Validator in three steps
01
Choose a GLB file
Select the file you want to inspect. It stays in your browser session.
02
Run the structural check
The tool checks the GLB header, JSON chunk, glTF asset version, and binary buffer bounds.
03
Fix or continue
Use the report as a first check, then preview or texture the model in the next workflow.
Continue with Fastin3D
Need textures for a valid model?
Take a structurally sound model into Fastin3D Texture Generator for a new material direction.
Open Texture GeneratorRelated 3D tools
Keep moving through the same workflow
FAQ
Questions about GLB Validator
What does the GLB Validator check?
It checks the GLB magic header, version, declared file length, JSON chunk, glTF asset version, and common buffer and bufferView bounds.
Is this a complete Khronos glTF Validator replacement?
No. It is a fast local structural check for common GLB problems. Use a full specification validator when you need exhaustive extension, material, animation, or accessor diagnostics.
Does validation change my file?
No. The validator only reads the file and returns a report. It does not rewrite or upload the original.
What should I do after a file passes?
Open it in GLB Viewer to inspect the result, or continue to Texture Generator if you want to explore a different material direction.
Does the validator check materials and animations?
No. This page focuses on common GLB container and buffer checks. Use the complete Khronos glTF Validator for exhaustive specification, extension, material, animation, and accessor diagnostics.
What does a failed GLB validation mean?
It means the file has one or more structural issues detected by this first-pass check. The report identifies the issue category, but a full validator or the application that exported the file may be needed for a complete fix.
Local processing for this tool. Your file is not uploaded for the free workflow.
Fastin3D
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Samples firstCustom generations use credits
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