01
Right-sized output for the use case
Converting from HDR to WEBP aligns the file with the encoding choices the downstream pipeline expects. The result is a deliverable that fits naturally into the destination workflow.
100% local
IMAGE
Convert HDR
to WEBP
Right-sized output for the use case.
Converting from HDR to WEBP aligns the file with the encoding choices the downstream pipeline expects. The result is a deliverable that fits naturally into the destination workflow.
— Drop area
WHY CONVERT
Why convert HDR to WEBP
02
Acceptance by downstream tools
WEBP is the format most receiving systems expect for this kind of content. Converting upstream avoids the rejection and silent re-encoding that often happen when HDR reaches an unprepared pipeline.
03
Lower storage and bandwidth cost
WEBP files are typically smaller than their HDR counterparts, which reduces hosting, transfer, and storage costs at scale. The savings compound when serving the same content to many recipients.
— How to convert
HDR to WEBP in three steps.
- 01
Open LocalConvert
Visit this page on any modern browser — no install, no signup, no plugin.
- 02
Drop or select your HDR file
Drag your HDR into the drop area, or click to pick one from your device.
- 03
Click Convert
Conversion runs entirely in your browser. When it's done, your WEBP file downloads to your device.
QUALITY & FIDELITY
Quality and fidelity
- Lossless source to lossy target: expect a small, irreversible quality loss.
- Target supports alpha but the source has none, so the output is fully opaque.
- Metadata (EXIF/tags) is preserved where the source provides it.
- WEBP can be lossy or lossless — switch modes for pixel-perfect output if needed.
Transparency HDR
✗ WEBP
✓
Color depth 32-bit float RGB (HDR) 8-bit RGBA
Metadata preserved ✓
FORMAT SPECS
Format specifications
| HDR | WEBP | |
|---|---|---|
| Extensions | .hdr .pic | .webp |
| MIME types | image/vnd.radiance | image/webp |
| Introduced | 1989 | 2010 |
| Maintainer | Radiance / Greg Ward | |
| Magic # | — | 52 49 46 46 ?? ?? ?? ?? 57 45 42 50 |
| Spec | View spec ↗ | View spec ↗ |
COMPATIBILITY
Where these formats work
| Platform | Windows | macOS | iOS | Android | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|---|---|---|---|
| WEBP | Native | Native | Native | Native | Native | Native | Native | Native |
WEBP
- Windows
- Native
- macOS
- Native
- iOS
- Native
- Android
- Native
- Chrome
- Native
- Firefox
- Native
- Safari
- Native
- Edge
- Native
Why LocalConvert
How LocalConvert compares
| Category | LocalConvert | Cloud converters |
|---|---|---|
| PRIVACY | Files never leave your device. The whole pipeline runs in your browser via WebAssembly. | Files travel to a remote server, sit in queue storage, and may be retained for analytics or moderation. |
| COST | Free, no signup, no daily quotas. | Often free for small files; paid tiers for batch / large / commercial use. |
| LIMITS | Limited only by your device's memory and CPU. Multi-GB files OK on desktop. | Typical 100 MB to 1 GB per-file caps, plus rate limits. |
— The formats
From · HDR
Radiance HDR
A high-dynamic-range raster format used in 3D rendering and HDR photography.
Typical uses
HDR photography, environment maps for 3D.
To · WEBP
Web Picture format
A modern image format from Google offering ~25–35% smaller files than JPEG and PNG, with both lossy and lossless modes and alpha support.
Typical uses
Web-first imagery, faster page loads, modern browsers.
— FAQ
Frequently asked.
Is HDR to WEBP conversion free?
Yes. LocalConvert is completely free, with no signup and no per-file or per-day limits.
Do my files get uploaded anywhere?
No. HDR to WEBP conversion happens entirely inside your browser using WebAssembly — your file never leaves your device.
What's the maximum file size?
There's no fixed cap — the practical limit is your device's available memory. Very large files may take longer or fail on low-RAM devices.
Does it work offline?
Yes — once the page has loaded, HDR to WEBP conversion works without an internet connection. Re-open the page once to cache it.
Will conversion preserve quality?
LocalConvert uses the industry-standard tools (FFmpeg, ImageMagick, Pandoc) — quality matches what professionals use on the command line. Lossy formats will still lose some quality on each re-encode.
— Related
Or convert these.
Browse all conversionsREFERENCES
Format references
Last verified:
100% local conversion.
HDR to WEBP is processed in your browser with WebAssembly. No upload, no tracking, no limits. Your file never leaves your device.