Conversion Tools

Format conversion across image, video, audio, and 3D.

Software	Description	Pricing	License	Tags	Best For
CAD Exchanger	Desktop app and SDK for viewing and converting CAD files across 30+ formats.	Free viewer, paid Lab and SDK	Free tier	Freemium · CAD	CAD format conversion
fre:ac	Free, open-source batch audio converter. See also: Software Reference → Viewers & File Utilities		Open source	Audio Batch · Open Source	Batch audio conversion
HandBrake	Free, open-source H.265/AV1 video encoder. See also: Software Reference → Viewers & File Utilities		Open source	H.265/AV1 · Open Source	Video encoding
Luminance HDR	HDR workflow. Merge brackets, tonemap, convert EXR/HDR/RGBE. See also: Software Reference → Viewers & File Utilities, Tools, Pipeline & Utilities → Photogrammetry & 3D Scanning		Open source	HDR Workflow · EXR	HDR workflow
Shutter Encoder	FFmpeg GUI with professional presets. See also: Software Reference → Viewers & File Utilities		Free	FFmpeg GUI · Pro Presets	Pro video encoding GUI
Transmutr	Converts FBX, OBJ, glTF and USD into SketchUp models with simplification, PBR materials and proxies.	From €99/yr	Paid	Paid · SketchUp	Importing models to SketchUp
Unity Asset Transformer (Pixyz)	CAD and 3D data prep that tessellates, decimates and optimizes heavy models for real-time use.	$2,450/seat/yr	Paid	Paid · CAD	CAD to real-time prep
XnConvert	Batch image converter, 80+ actions. See also: Software Reference → Viewers & File Utilities		Free	Batch · 80+ Actions	Batch image conversion

Related:

123apps Free tier. Free web tools for audio, video, image.
3DGS Converter. Format conversion tool for 3D Gaussian Splatting data.
Adobe USD Fileformat Plugins. USD plugins that read and write FBX, glTF, OBJ, PLY, STL, SPZ and SBSAR.
See also: Tools, Pipeline & Utilities → USD (Universal Scene Description)
Assimp (GitHub). Open-source library, 40+ 3D format import (C/C++/Python).
Assimp (site). A portable Open-Source library to import various well-known 3D model formats in a uniform manner.
CloudConvert Free tier. Online file converter covering 200+ formats, with an API for automating conversions.
Convertio Free tier. Web-based file converter for images, video, audio, documents and other formats.
F Spy USD. Unofficial fSpy to USD converter.
FBX2glTF. Meta's CLI for FBX → glTF 2.0.
FreeConvert Free tier. Free online file converter.
glTF Pipeline. GlTF GLB, Draco compress, texture resize.
GLTF Report. Web app to diagnose and optimize glTF files. Inspector supports BASIS/KTX2 textures. By Don McCurdy.
glTF Transform. JS library/CLI for reading, editing, optimizing glTF (Draco, KTX2).
glTF Validator. Official Khronos spec validation.
glTF Viewer. Web-based glTF/GLB viewer.
gltfpack. Aggressive glTF mesh/texture optimization.
guc. glTF to USD converter that keeps materials as MaterialX or UsdPreviewSurface.
ImageMagick. Open-source command-line suite for converting, resizing and batch-editing images across 200+ formats.
MAZANOKE. Open-source image optimizer and converter that compresses and changes formats locally in the browser.
Needle USD Converter. Web-based USD/USDZ viewer and converter.
obj2gltf. Cesium's OBJ → glTF with PBR mapping.
OIIO (OpenImageIO). ASWF CLI tools, 100+ formats. VFX pipeline standard.
See also: Tools, Pipeline & Utilities → Pipeline Standards
Online Convert Free tier. Web-based format converter.
Packyderm. A lightweight tool that lets you browse and extract the contents of unitypackage files without opening Unity.
Pixelicious. Image-to-Pixel Art converter.
PNGQuant. CLI lossy PNG compression.
Remove Audio Video Converter Free tier. Browser-based converter that turns MOV, MKV, AVI, WebM and other videos into MP4 or MP3 without uploading the file.
SoX. Command-line audio converter and batch processor for format, resample, and effect passes.
See also: Software Reference → Audio Software
Squoosh. Google. AVIF/WebP/JPEG XL image compression.
TinyPNG Free tier. Lossy PNG/JPEG compression.
VERT.sh. General-purpose online converter.