Lightroom's HDR merge is great. Here's when you'd want MergeHDR instead.

Lightroom Classic's HDR merge has earned its reputation. Select a set of bracketed frames in the Library module, press Photo → Photo Merge → HDR (or the ⌘H shortcut), and Lightroom aligns the frames, applies deghosting if something moved between shots, and writes out a single 32-bit DNG that behaves like any other raw file in your catalog — full exposure and white-balance latitude, no baked-in tone-mapping decisions you can't undo. For anyone already editing inside a Lightroom catalog, that's a genuinely strong, natural-feeling workflow, and there's no real reason to abandon it if it's working for you.

The part Lightroom doesn't do anything about is finding the bracket sets in the first place. Photo Merge only works on frames you've already selected — Lightroom has no way to look through a library and tell you "these eleven photos, taken across four different days, are exposure brackets that haven't been merged yet." Across a big travel library, or just months of ordinary shooting, that selection step is where bracket sets quietly pile up unmerged, because remembering which sessions had brackets and hunting them down by hand is real friction that's easy to keep postponing.

Who should use which

Keep using Lightroom Classic if you already run a Lightroom catalog workflow, want a fully re-editable 32-bit DNG rather than a finished export, or you're merging a curated, deliberately chosen shoot rather than sifting through a large mixed library. Its alignment and deghosting are genuinely solid, and there's no upside to abandoning a workflow that's already serving you well.

Choose MergeHDR if bracket sets tend to accumulate unmerged because manually finding and selecting them in a catalog is friction you keep deferring, if you shoot on an iPhone or bring in files from a camera or drone and want an iPhone/iPad app rather than a desktop-only one, or if you only need the merge and would rather not carry a monthly plan for a whole creative suite to get it. MergeHDR is free to try, and unlimited costs less per year than a Photography plan does per month — with the option to pay once and be done.

Using both together

These two tools coexist without any conflict. A common pattern is letting MergeHDR handle detection and the everyday merges that happen inside the Photos library — catching brackets you might otherwise forget about — while keeping Lightroom Classic for the shoots you know in advance you'll be editing deeply, where the 32-bit DNG's extra latitude is worth the manual selection step. MergeHDR's full-quality exports can also be brought into a Lightroom catalog afterward if you want to do further editing there once the merge itself is done.

The verdict

This isn't Lightroom versus MergeHDR so much as two different stages of the same job. Lightroom Classic is, and remains, an excellent HDR merge tool once you've found the frames — that part of its reputation is deserved. MergeHDR exists for the step before that: making sure the bracket sets scattered across an ordinary Photos library actually get noticed and merged instead of sitting there indefinitely. If your workflow already surfaces every bracket reliably, there's no gap to fill. If it doesn't, that's the gap MergeHDR closes.

See how MergeHDR works