Convert HDR to PPM
Convert HDR files to PPM locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
Upload FilesPlatform Statistics
How to convert HDR to PPM
- Drop your .hdr files above, or click Upload Files. You can add many files at once.
- PPM is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. ImageMagick runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .ppm files as soon as each one finishes.
What to know about HDR to PPM conversion
- PPM is best for image processing pipelines and scientific code, and opens in GIMP, ImageMagick and Netpbm tools.
HDR vs PPM
| Feature | HDR (Radiance HDR) | PPM (Netpbm Portable Pixmap) |
|---|---|---|
| Compression | lossless | uncompressed |
| Transparency | No | No |
| Animation | No | No |
| Best for | HDR environment maps for lighting 3D scenes | image processing pipelines and scientific code |
| Opens in | Blender, 3D renderers and HDR viewers | GIMP, ImageMagick and Netpbm tools |
HDR (Radiance HDR): A high-dynamic-range RGBE image format commonly used for environment maps and lighting in 3D rendering.
PPM (Netpbm Portable Pixmap): A minimal uncompressed color image format from the Netpbm toolkit, popular in image processing pipelines.
Conversion options
- Resize by width, height or both (aspect ratio is preserved)
- Filters: grayscale, sepia, blur and sharpen
- Custom output file name
Frequently asked questions
Is it safe to convert HDR to PPM here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several HDR files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert PPM to HDR.
Convert HDR to other formats
- HDR to JPG
- HDR to PNG
- HDR to PDF
- HDR to WEBP
- HDR to GIF
- HDR to SVG
- HDR to AVIF
- HDR to ICO
- HDR to TIFF
- HDR to BMP
- HDR to JXL
- HDR to PSD
Convert other formats to PPM
- JPG to PPM
- PNG to PPM
- PDF to PPM
- WEBP to PPM
- HEIC to PPM
- GIF to PPM
- SVG to PPM
- AVIF to PPM
- ICO to PPM
- TIFF to PPM
- BMP to PPM
- JXL to PPM
See every HDR converter and PPM converter, or browse the full converter directory.