# Convert PNM to HDR

> Convert PNM to HDR online for free. Runs entirely in your browser, so your files never leave your device. Fast batch conversion, no sign-up, no watermarks.

URL: https://www.converterrr.com/pnm-to-hdr

- Runs in the browser with ImageMagick: files are not uploaded, and no credits are used.
- Engines: ImageMagick (browser), ImageMagick (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "hdr"` (paid plans).
- More: [Image converter](https://www.converterrr.com/image-converter), [PNM converter](https://www.converterrr.com/pnm-converter).

## How to convert PNM to HDR

1. **Add your PNM files.** Drag and drop PNM files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose HDR.** HDR is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Your files are converted right in your browser in seconds.
4. **Download your HDR.** Download each HDR file, or everything at once as a ZIP.

## Good to know

- PNM files are typically used for image processing pipelines, while HDR is best for HDRI environment maps in 3D software.
- This conversion runs on ImageMagick, running locally in your browser — nothing is uploaded and it works even on slow connections.

## PNM vs HDR

|  | PNM | HDR |
| --- | --- | --- |
| Full name | Portable Anymap | Radiance HDR |
| Type | Image | Image |
| Extensions | .pnm | .hdr |
| MIME type | image/x-portable-anymap | image/vnd.radiance |
| Best for | image processing pipelines | HDRI environment maps in 3D software |
| Properties | lossless | HDR |

**PNM:** PNM is the umbrella name for the Netpbm PBM, PGM and PPM formats.

**HDR:** Radiance HDR (RGBE) stores high-dynamic-range images and is widely used for environment maps and image-based lighting.

The other way around: [convert HDR to PNM](https://www.converterrr.com/hdr-to-pnm).

## Related conversions

- [HDR to PNM](https://www.converterrr.com/hdr-to-pnm) (in the browser)
- [PNM to PNG](https://www.converterrr.com/pnm-to-png) (in the browser)
- [PNG to HDR](https://www.converterrr.com/png-to-hdr) (in the browser)
- [PNM to JPG](https://www.converterrr.com/pnm-to-jpg) (in the browser)
- [JPG to HDR](https://www.converterrr.com/jpg-to-hdr) (in the browser)
- [PNM to WebP](https://www.converterrr.com/pnm-to-webp) (in the browser)
- [WebP to HDR](https://www.converterrr.com/webp-to-hdr) (in the browser)
- [PNM to JPEG](https://www.converterrr.com/pnm-to-jpeg) (in the browser)
- [HEIC to HDR](https://www.converterrr.com/heic-to-hdr) (in the browser)
- [PNM to PDF](https://www.converterrr.com/pnm-to-pdf) (cloud)
- [JPEG to HDR](https://www.converterrr.com/jpeg-to-hdr) (in the browser)
- [PNM to GIF](https://www.converterrr.com/pnm-to-gif) (in the browser)

## Convert PNM to other formats

[PNM to PNG](https://www.converterrr.com/pnm-to-png), [PNM to JPG](https://www.converterrr.com/pnm-to-jpg), [PNM to WebP](https://www.converterrr.com/pnm-to-webp), [PNM to JPEG](https://www.converterrr.com/pnm-to-jpeg), [PNM to PDF](https://www.converterrr.com/pnm-to-pdf), [PNM to GIF](https://www.converterrr.com/pnm-to-gif), [PNM to AVIF](https://www.converterrr.com/pnm-to-avif), [PNM to ICO](https://www.converterrr.com/pnm-to-ico), [PNM to TIFF](https://www.converterrr.com/pnm-to-tiff), [PNM to BMP](https://www.converterrr.com/pnm-to-bmp), [PNM to PSD](https://www.converterrr.com/pnm-to-psd), [PNM to EPS](https://www.converterrr.com/pnm-to-eps), [PNM to JXL](https://www.converterrr.com/pnm-to-jxl), [PNM to TGA](https://www.converterrr.com/pnm-to-tga), [PNM to DDS](https://www.converterrr.com/pnm-to-dds), [PNM to EXR](https://www.converterrr.com/pnm-to-exr), [PNM to JP2](https://www.converterrr.com/pnm-to-jp2), [PNM to CUR](https://www.converterrr.com/pnm-to-cur), [PNM to PPM](https://www.converterrr.com/pnm-to-ppm), [PNM to QOI](https://www.converterrr.com/pnm-to-qoi), [PNM to PCX](https://www.converterrr.com/pnm-to-pcx), [PNM to PGM](https://www.converterrr.com/pnm-to-pgm), [PNM to PBM](https://www.converterrr.com/pnm-to-pbm), [PNM to XPM](https://www.converterrr.com/pnm-to-xpm)

## Convert other formats to HDR

[PNG to HDR](https://www.converterrr.com/png-to-hdr), [JPG to HDR](https://www.converterrr.com/jpg-to-hdr), [WebP to HDR](https://www.converterrr.com/webp-to-hdr), [HEIC to HDR](https://www.converterrr.com/heic-to-hdr), [JPEG to HDR](https://www.converterrr.com/jpeg-to-hdr), [GIF to HDR](https://www.converterrr.com/gif-to-hdr), [AVIF to HDR](https://www.converterrr.com/avif-to-hdr), [SVG to HDR](https://www.converterrr.com/svg-to-hdr), [ICO to HDR](https://www.converterrr.com/ico-to-hdr), [TIFF to HDR](https://www.converterrr.com/tiff-to-hdr), [BMP to HDR](https://www.converterrr.com/bmp-to-hdr), [HEIF to HDR](https://www.converterrr.com/heif-to-hdr), [PSD to HDR](https://www.converterrr.com/psd-to-hdr), [EPS to HDR](https://www.converterrr.com/eps-to-hdr), [AI to HDR](https://www.converterrr.com/ai-to-hdr), [JXL to HDR](https://www.converterrr.com/jxl-to-hdr), [CR2 to HDR](https://www.converterrr.com/cr2-to-hdr), [NEF to HDR](https://www.converterrr.com/nef-to-hdr), [DNG to HDR](https://www.converterrr.com/dng-to-hdr), [CR3 to HDR](https://www.converterrr.com/cr3-to-hdr), [ARW to HDR](https://www.converterrr.com/arw-to-hdr), [TGA to HDR](https://www.converterrr.com/tga-to-hdr), [DDS to HDR](https://www.converterrr.com/dds-to-hdr), [EXR to HDR](https://www.converterrr.com/exr-to-hdr)

## PNM to HDR: frequently asked questions

### How do I convert PNM to HDR?

Drop your PNM file onto the converter above, make sure HDR is selected, and click Convert. When it's done, download the HDR file — it usually takes a few seconds.

### Is it safe to convert PNM to HDR here?

Yes. PNM to HDR conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server.

### Is the PNM to HDR converter free?

Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250.

### Will converting PNM to HDR reduce quality?

No — HDR preserves the content of your PNM file as faithfully as the format allows.

### Can I convert multiple PNM files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

### Can I convert HDR back to PNM?

Yes — use our HDR to PNM converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.