It exists for one specific job: taking footage that already exists in SDR and giving it the brightness headroom and 10-bit gradients an HDR screen can actually show. That covers filmmakers and editors bringing archival or client footage up to HDR10 without a re-grade, creators who want phone footage to hold up on YouTube HDR and modern TVs, and anyone with an HDR display and a library of flat-looking clips.
The service is billed per second of video with a dollar-denominated balance: top up any amount from $50, or subscribe to a plan that lowers your rate. There is no free tier and no public API; conversion happens through the web app after signing in. Payments are processed by Polar.sh as the merchant of record, which handles VAT and sales tax.
Uploads and converted outputs live in a private storage bucket with no public address at all, reachable only by short-lived signed URL, and are deleted automatically after 7 days. Full detail is in the Privacy Policy. For anything else, see Contact.
The deliberate choice here is narrowness. Every competing tool bundles SDR to HDR conversion into a suite: upscaling, frame interpolation, denoising, stabilisation. Those are useful and they are also why you end up installing a desktop application, committing to an annual licence, and finding a GPU. This does one operation, in a browser, priced by the second, so that converting a single clip is a two-minute decision rather than a purchase.
What that costs you is honesty about the limits, which are on every page here rather than in a footnote. Conversion cannot recover clipped highlights, cannot fix banding already baked into an 8-bit source, and cannot make ungraded log footage look graded. Clips are capped at 60 seconds and 500 MB. Output is HDR10 and not Dolby Vision. If one of those rules out your use case, it is better to find out before paying than after.