Best Image Format for HDR Photography
TIFF at 16-bit or 32-bit is the best format for HDR photography during editing and archiving, while PNG at 16-bit or JPG at quality 95+ is best for sharing the final tone-mapped result. HDR (High Dynamic Range) photography captures a wider range of light intensities than standard photography, and the format must be capable of storing this extended data without clipping highlights or crushing shadows.
The HDR workflow has two distinct stages: the merged HDR image (which contains extended dynamic range data) and the tone-mapped output (which compresses that range for standard display). Each stage has different format requirements. The merged HDR source needs high bit depth. The tone-mapped output can use standard 8-bit formats.
Here is how to handle HDR images through the complete workflow.
TIFF for HDR Source Files
After merging your bracketed exposures in Lightroom, Photomatix, Aurora HDR, or Luminance HDR, the result should be saved as a 16-bit or 32-bit TIFF. This preserves the full extended dynamic range for subsequent tone-mapping and editing.
A 16-bit TIFF stores 65,536 tonal levels per channel (compared to 256 levels in 8-bit). This gives you enormous editing headroom to adjust exposure, recover highlights, and lift shadows without introducing banding or posterization.
- 16-bit TIFF: standard for most HDR workflows. Provides excellent editing headroom.
- 32-bit floating-point TIFF: maximum dynamic range preservation. Only needed for extreme HDR scenes.
- LZW compression: reduces file size 30-50% without any quality loss.
- Embed the camera color profile or a wide-gamut profile (ProPhoto RGB, Adobe RGB).
- Never save the HDR merge as 8-bit. You lose the dynamic range advantage.
PNG and JPG for Tone-Mapped Output
After tone-mapping your HDR image to compress the dynamic range for standard displays, the output is a standard dynamic range image. At this stage, PNG and JPG both work well.
PNG at 16-bit preserves the tone-mapped result losslessly with more tonal precision than 8-bit. JPG at quality 95+ provides a much smaller file for sharing with minimal visible quality loss. For web sharing, JPG is the practical choice. For archiving your best work, PNG is preferred.
AVIF and HDR Display Support
The emerging AVIF format supports HDR display output with PQ (Perceptual Quantizer) or HLG (Hybrid Log-Gamma) transfer functions. On HDR-capable displays (HDR10, Dolby Vision monitors, OLED phones), AVIF can deliver true HDR viewing experiences.
As of 2026, support for HDR AVIF is growing but not universal. Chrome, Firefox, and Edge support AVIF on HDR displays. Safari has limited support. For future-proofing, consider exporting an AVIF version alongside your standard JPG/PNG outputs.
- AVIF with PQ transfer function: true HDR output for compatible displays.
- 10-bit AVIF: 1024 tonal levels per channel (vs. 256 in 8-bit JPG).
- Browser support: Chrome, Firefox, Edge on HDR displays. Safari limited.
- Fallback: always provide a standard JPG/PNG for non-HDR displays.
- This is a forward-looking option, not a current requirement.
Editing Workflow Best Practices
A disciplined HDR workflow preserves the most image quality from capture to final output.
- Capture: shoot RAW brackets (3-5 exposures, 1-2 EV apart) on a tripod.
- Merge: combine in HDR software to produce a 16-bit or 32-bit merged file.
- Save merged: TIFF 16-bit with LZW compression. This is your HDR master.
- Tone-map: apply tone mapping (natural, dramatic, or artistic) to compress the range.
- Edit: fine-tune the tone-mapped result in your photo editor.
- Export for sharing: JPG quality 95+ for web. PNG 16-bit for archiving.
- Keep the merged TIFF master. You can re-tone-map it with different settings anytime.
Common HDR Format Mistakes
Several common mistakes reduce the quality of HDR photographs.
- Saving the merged HDR as 8-bit JPG before tone-mapping. This clips the extended range.
- Not keeping the merged TIFF master. Once discarded, you cannot change the tone mapping.
- Applying lossy compression to the HDR source file.
- Editing in 8-bit mode. Always work in 16-bit until the final export.
- Ignoring color profile: use a wide-gamut profile (Adobe RGB, ProPhoto RGB) for the editing workflow, and convert to sRGB only for the final web output.
Frequently Asked Questions
What format should I save HDR photos in?
Save the merged HDR image as 16-bit TIFF for editing and archiving. After tone-mapping, export as JPG at quality 95+ for sharing or PNG at 16-bit for archiving. Always keep the TIFF master for future re-editing.
Can JPG store HDR data?
Standard JPG is limited to 8-bit per channel (256 levels), which cannot store the extended dynamic range of HDR images. JPEG XL supports HDR, but adoption is still limited. For HDR data, use 16-bit or 32-bit TIFF.
What is the difference between HDR and tone mapping?
HDR is the process of merging multiple exposures to capture a wider dynamic range than a single exposure. Tone mapping compresses that extended range so it displays correctly on a standard (SDR) monitor. The HDR merge preserves the data; tone mapping adapts it for display.
Should I shoot RAW or JPG brackets for HDR?
Always shoot RAW brackets. RAW files contain 12-14 bits of data per channel compared to JPG's 8 bits. This gives the HDR merge software more data to work with, producing a higher-quality merged result with smoother tonal transitions.
Convert TIFF to JPG for sharing