•5 min read•Photo
Verdict:For free RAW work we proved on Linux, use darktable (catalog + develop) or RawTherapee (deep develop + batch). Affinity is the polished free-for-individuals desktop option when you stay on Windows or macOS.
| Tool | Price | Platforms | Best for | Tested |
|---|---|---|---|---|
| darktable | Free (open source) | Linux, Windows, macOS (Apple silicon) | Free catalog plus non-destructive RAW editing | Yes |
| RawTherapee | Free (open source, GPLv3) | Linux, Windows, macOS | Free deep RAW development and scriptable batch conversion | Yes |
| Affinity | Free for individuals | Windows, macOS | Free individual photo, vector and layout work in one app | Docs only |
Last updated October 18, 2026
Short answer by use case: for RAW cataloguing + develop, use darktable (we exported JPEG from a Canon CR2). For deep RAW / batch conversion without a catalog, use RawTherapee (same CR2, CLI batch with a .pp3 profile). For a polished free-for-individuals desktop app on Windows or macOS, Affinity’s site states the product is free for individuals—we reviewed that claim from the vendor page only. Phone-first editors and Adobe Creative Cloud plans are out of scope for this free hub.
How we ordered the tools: within each job, tools we tested hands-on (darktable, RawTherapee) come before the docs-only option (Affinity). None of these products is ours.
“Best free photo editor” usually hides two different jobs: library (rate, tag, find) and pixel/RAW develop. Pick the job first or you will hate any list.
Wedding / travel libraries (thousands of files). darktable’s lighttable is the free path closest to Lightroom Classic’s library. Details and XMP notes: Lightroom alternatives and Lightroom vs darktable.
Single-image RAW craft or folder batches. RawTherapee. Sidecar .pp3 files version cleanly in git-style workflows.
Composite / retouch layers (not a catalog). That is closer to Photoshop. Free options on this site focus on RAW; for role split see Lightroom vs Photoshop. Affinity can cover pixel work for individuals per its site—docs-only here.
Leaving Adobe but keeping paid polish. See paid/perpetual options on our Lightroom alternatives page (DxO PhotoLab docs-only). Free-only cut: free Lightroom alternative.
Studio tether / Capture One habits. Not free; compare on Lightroom vs Capture One.
What it is for: free catalog (lighttable) plus non-destructive darkroom. Edits live in XMP sidecars.
What we saw in testing: darktable 5.0.1 from Debian opened a 25 MB Canon EOS 5D Mark III CR2 and wrote a 5794×3868 JPEG (~5.3 MB) via darktable-cli with default processing. A second run that also downscaled to 2048 px wide finished in about 2.4 seconds wall time on our CPU-only VM. Default look was slightly warm/dim for the tungsten bathroom scene—usable, not “broken.” Debian’s 5.0.1 lagged the install page’s newer release when we checked related pages.
What it lacks: no Adobe-style cloud sync between desktop and phone; module vocabulary differs from Lightroom’s Basic panel; Lightroom presets do not import as presets. darktable’s install page notes Apple silicon macOS builds and currently no official Intel Mac releases—verify on darktable.org/install.
Where to get it: darktable.org.
What it is for: free RAW processor with a file browser—not a catalog database.
What we saw in testing: RawTherapee 5.11 wrote a 5788×3862 JPEG (~3.8 MB at quality 90) from the same CR2. A two-line .pp3 raising exposure +1 EV applied from the CLI finished in about 2.8 seconds. That is the migration hook: plain-text sidecars you can copy across folders.
What it lacks: no Lightroom-style catalog, no face recognition, no mobile app, no reading of Lightroom edits. UI exposes many technical controls (demosaic, sharpening algorithms). Site listed 5.13 when related pages were checked; we tested 5.11 from Debian.
Where to get it: rawtherapee.com (GPLv3).
What it is for: free-for-individuals photo editing plus vector and layout in one app, per affinity.studio.
Docs-only: we did not install Affinity. The site positions a combined creative app and states it is free for individuals. It is not a catalog-first Lightroom clone, and we saw no Linux download on the pages we used for the Lightroom hub.
What it lacks vs free RAW tools above: no Linux build in our source pages; weaker fit if your pain is a 50k-image library rather than retouching a few files.
Where to get it: affinity.studio (Windows and macOS).
If you never shoot RAW, darktable and RawTherapee still open JPEGs, but their value drops: you are paying the learning curve of a RAW developer for what a simpler editor might do. Affinity (docs-only) or even OS Photos apps may be enough for social crops. This hub still lists RAW-capable free tools because that is where “photo editor” searchers who outgrew phone apps usually land—and where our tests have evidence.
Our CLI exports used default processing profiles. They prove the pipeline works; they are not a claim that darktable “matches” Adobe color science. Camera profiling, display calibration and soft-proofing are separate disciplines. If client brand colors are contractual, budget time to rebuild looks—not a one-click preset import.
DxO PhotoLab (perpetual license per DxO’s product page on the Lightroom hub) and Capture One (subscription/license SKUs on Capture One’s store—see compare page) exist for photographers who need vendor support, tethering polish or specific noise tools. They are not “best free.” Keep this hub honest: free first, paid options on our Lightroom alternatives page.
We used a CC0 Canon EOS 5D Mark III CR2 (~25 MB) from raw.pixls.us. darktable 5.0.1 and RawTherapee 5.11 came from Debian 13 packages on a CPU-only VM. Commands were CLI exporters (darktable-cli, rawtherapee-cli), not a guided GUI tour—so UI learning-curve comments elsewhere on this site come from documentation and prior experience, while export success is measured. Affinity remains uninstalled; any “Develop persona” claims from third-party forums are out of scope until we can run the app.
On Linux, darktable and RawTherapee are the free editors we actually ran: both exported JPEGs from a Canon CR2 RAW file on our Linux machine. Use darktable if you also want a catalog, and RawTherapee for folder-based batch develop. Affinity lists Windows and macOS only, so it is not an option on a Linux desktop.
Debian 13, CPU-only. Canon CR2 sample from raw.pixls.us (CC0). Commands: darktable-cli, rawtherapee-cli. Outputs: JPEG exports logged on our Lightroom alternatives tests. Affinity: vendor site only, 2026-10-14.
Search results for this query often crown a single winner. Our evidence only supports narrower claims: darktable and RawTherapee exported a real CR2 on Linux; Affinity is documented as free for individuals. That is enough to start, not enough to declare a global ranking across phones, Windows laptops and color-managed studios. Re-test on your camera samples before you delete Lightroom catalogs.
No Affinity install, no Lightroom install, no GPU export or tethered shooting tests. Debian packages lag upstream darktable/RawTherapee releases.
darktable 5.0.1 and RawTherapee 5.11 were installed from Debian 13 packages and run from the command line on a CPU-only Linux machine, converting a 25 MB Canon EOS 5D Mark III CR2 (CC0 sample from raw.pixls.us) to JPEG. Affinity was not installed; it is reviewed from affinity.studio only (stated free for individuals). Prices and install notes were read on 2026-10-14.