Last updated 19 August 2026
HDRLOGO is a free tool, your images stay yours, and it comes with no warranty.
Use it for whatever you like, including commercial work. Don't use it on material you have no right to. Check the output before you rely on it. That is the whole agreement in four sentences; the rest is the same thing said carefully.
These Terms cover your use of the HDRLOGO website at hdrlogo.com and the HDRLOGO iOS app (together, "HDRLOGO"). By using either, you agree to them. If you don't agree, don't use it.
HDRLOGO converts a standard-dynamic-range image into an HDR gain-map JPEG (ISO 21496-1), running entirely on your own device. There is no account to create and nothing to pay.
You are granted a personal, non-exclusive, revocable licence to use HDRLOGO, including for commercial work and for images you intend to sell or publish. You may not redistribute it as your own product, or attempt to interfere with, overload, or gain unauthorised access to the service or the systems hosting it.
The iOS app is also subject to Apple's standard Licensed Application End User Licence Agreement. Where that agreement and these Terms conflict for the iOS app, Apple's agreement governs.
You keep every right you already had in the images you process, and in the files HDRLOGO produces from them. No rights of any kind are claimed over them.
This is not merely a promise. As described in the Privacy Policy, your images are never transmitted anywhere — the conversion happens on your device — so there is no copy of your work to claim rights in.
You are responsible for having the right to use the images you put through HDRLOGO. Don't use it to process material you don't own or have permission to use, or to produce anything unlawful. Because nothing is uploaded, there is no moderation and no review; the responsibility for what you convert rests entirely with you.
HDRLOGO is provided free of charge and with no guarantee of availability. The website may be changed, interrupted, or discontinued at any time, and app updates may add, alter, or remove features. There is no service-level commitment and no obligation to provide support.
Because the encoder runs on your device, a copy of the app you have already installed keeps working whether or not the website does.
HDRLOGO is provided "as is" and "as available", without warranties of any kind, whether express or implied, including any implied warranties of merchantability, fitness for a particular purpose, or non-infringement.
Two specific things are worth naming, because they are the realistic ways output can disappoint you:
To the fullest extent permitted by law, HDRLOGO and its developer are not liable for any indirect, incidental, special, or consequential damages, or for any loss of data, images, profits, or business, arising out of your use of or inability to use HDRLOGO — including any damage to or loss of an original image.
Keep your originals. HDRLOGO writes a new file and does not modify or delete the image you started from, but no software should be the only thing standing between you and your only copy of a photograph.
Nothing in these Terms limits liability that cannot be limited by law, and some jurisdictions do not allow certain exclusions, in which case those exclusions do not apply to you.
These Terms may be updated, and the date at the top of the page will change when they are. Continuing to use HDRLOGO after a change means you accept the updated Terms.
Questions about these Terms: hello@hdrlogo.com