CX ConvertX
3D models

OBJ → GLB

Learn about the formats: What is OBJ? What is GLB?

Convert your OBJ 3D models to GLB format effortlessly to ensure compatibility with modern web-based AR and VR platforms. This tool is essential for 3D artists and developers needing to move static geometry into real-time environments.

The OBJ format is a classic, text-based geometry definition file that stores vertex data, face definitions, and texture coordinates. In contrast, GLB is the binary version of the glTF format, acting as a self-contained package that includes geometry, textures, and material information in a single file. Converting OBJ to GLB packages these disparate elements into a streamlined, web-ready container optimized for fast loading in browser-based engines like Three.js or Babylon.js.

The conversion process is lossless, meaning your 3D model maintains its geometric integrity and vertex precision exactly as it was in the original OBJ file.

Tips

Common use cases

Why ConvertX stays free — forever

We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.

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Free tools today — and always

Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.

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Privacy-first processing

Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.

File formats: what to choose

A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.

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3D models

Meshes and scenes for 3D printing, games, and CAD.

Common extensions: OBJ, STL, GLTF, GLB, FBX, PLY

Advantages
  • + STL is standard for 3D printing
  • + GLTF/GLB is optimized for the web and AR
  • + OBJ is widely supported in 3D software
Disadvantages
  • File size grows quickly with detail
  • Materials and animations may not transfer
  • Some formats lack units or scale metadata
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Images

Raster and vector graphics for web, print, and photography.

Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF

Advantages
  • + WebP and AVIF offer excellent compression for the web
  • + PNG keeps transparency and sharp edges
  • + SVG scales without quality loss
Disadvantages
  • RAW and TIFF files are large and slow to share
  • JPEG loses quality on every re-save
  • Some formats are not supported in older browsers
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Documents

Office files, PDFs, ebooks, and plain text.

Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT

Advantages
  • + PDF locks layout for printing and sharing
  • + DOCX and ODT are easy to edit collaboratively
  • + Plain text works on any device
Disadvantages
  • PDF is hard to edit without special tools
  • Complex layouts may shift after conversion
  • Scanned PDFs need OCR for editable text
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Video

Clips, streams, screen recordings, and movies.

Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG

Advantages
  • + MP4 (H.264/H.265) plays almost everywhere
  • + WebM is efficient for web embedding
  • + MKV can hold multiple audio and subtitle tracks
Disadvantages
  • High-resolution video needs lots of storage and bandwidth
  • Re-encoding always takes time and may reduce quality
  • Some codecs require licensing for commercial use

Frequently asked questions

No, the conversion is lossless, so the geometric quality and vertex data remain identical to the original OBJ.
The file size changes only slightly, as GLB effectively packages the data into a binary structure compared to the text-heavy OBJ format.

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