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Why convert HTM to HDR?
Fast
Your file is converted in under 30 seconds in our cloud.
Secure
Files are automatically deleted after 1 hour.
Quality preserved
Maximum quality preserved during conversion.
About the HTM format
HTM — HyperText Markup Language (short extension)
HTM is an alternate file extension for HTML, used historically by older Windows systems (FAT/NTFS 8.3 filename limitation) and some web servers. The file format is identical to HTML in every way — it contains the same markup language used to build web pages.
Common uses
- Legacy web page files from early Windows servers
- Old website archive recovery
- Windows 3.x and early IIS HTML files
- Converting older HTM files to modern HTML5
About the HDR format
HDR — Radiance RGBE High Dynamic Range
HDR (Radiance .hdr) is a high dynamic range image format developed for the Radiance rendering system. It stores luminance information far beyond standard 8-bit images using a shared-exponent encoding, making it the standard for HDR environment maps in 3D rendering.
Common uses
- 3D rendering environment maps (IBL)
- HDR panorama photography storage
- VFX and CGI lighting reference images
- Tone mapping source images
Related conversions
Other conversions available for HTM and HDR files
Frequently asked questions
Is the conversion free?
Yes, basic conversion is completely free. For large volumes, check out our paid plans.
What is the maximum file size?
Free accounts can convert files up to 25 MB. Pro accounts up to 100 MB.
How long are my files kept?
Files are automatically deleted after 1 hour on the free plan, 24 hours on Pro.
What formats are supported?
We support over 200 source and target formats. See our complete formats page.