# HDRJPG

HDRJPG is an API and SDK developer platform that converts iPhone HEIC, Android Ultra HDR and Lightroom gain map JPEGs, and EXR photos into web-ready HDR images: JPEG with an embedded gain map (shown in HDR by Chrome, Edge and Safari 26+, and as a standard JPEG everywhere else), plus AVIF, JPEG XL and MP4. Standard photos can be expanded to HDR. It solves the problem of cross-browser HDR compatibility, allowing developers to deliver Instagram-quality true-HDR images to users with a single API call, while providing graceful fallbacks to Standard Dynamic Range (SDR) for unsupported devices. It is built for image-heavy platforms like Real Estate, Travel, E-Commerce, and Social Networks, featuring privacy-first European processing.

## Documentation
- [API Documentation](https://hdrjpg.com/documentation/api): Learn how to integrate the REST API to convert and standardize HDR images.
- [SDK Documentation](https://hdrjpg.com/documentation/sdk): Official SDK libraries for interacting with the HDRJPG service.
- [Embedding Guide](https://hdrjpg.com/documentation/embedding): Instructions on using the embed snippet to automatically serve the most efficient true-HDR format supported by the user's browser.

## Guides
- [HDR image formats explained](https://hdrjpg.com/documentation/formats): Gain map JPEG, Ultra HDR, ISO 21496-1, AVIF, JPEG XL, HEIC and EXR, and which browsers show each in HDR.
- [How to publish HDR photos on your website](https://hdrjpg.com/learn/publish-hdr-photos-on-your-website): Which file to export, the HTML, what strips HDR on upload, and how to check the result.
- [How to keep the HDR from an iPhone photo on the web](https://hdrjpg.com/learn/iphone-hdr-photos-on-the-web): Turning an iPhone HEIC into an HDR JPEG every browser can show.
- [Why HDR photos look flat after uploading](https://hdrjpg.com/learn/why-hdr-photos-look-flat): How CMSs, CDNs and plugins remove gain maps, and how to avoid it.

## Showcases
- [NASA Artemis in HDR](https://hdrjpg.com/showcases/nasa-artemis): Gallery of Artemis II crew photography — the first human-taken photos from lunar distance since Apollo 17 in 1972 — manually remapped to HDR and embedded using HDRJPG technology.

## Resources
- [Examples](https://hdrjpg.com/examples): Visual before-and-after examples demonstrating true HDR delivery on compatible screens.
- [Pricing](https://hdrjpg.com/pricing): 300 watermarked conversions a month free; subscribed, 0.07 USD per conversion with no watermark and no cap.
- [Free API key](https://hdrjpg.com/signup): Sign up with an email address, no card.
- [Convert online](https://hdrjpg.com/try): Upload and test HDR conversion directly from the browser.

## Legal
- [Terms](https://hdrjpg.com/terms)
- [Privacy Policy](https://hdrjpg.com/privacy)
- [Agreement](https://hdrjpg.com/agreement)