Introduction
Rubiks Cube Solver is a free puzzle solver hosted at speedcube.com.br. It runs in the browser, needs no account, and comes from an MIT-licensed open-source project on GitHub. The site packs a few other things around the solver: a speedcubing timer, pages on notation and algorithms, world record data, and an unofficial API for World Cube Association (WCA) data.
This review is based on the vendor's site, the GitHub README and the API docs. scored.tools has not run the solver, so anything about solution quality comes from the project's own claims. The overall score is 6.6/10. That figure is high on price and ease of use and pulled down by thin public evidence that the solver output is good.
Key Features
Solver with exposed search limits
The solver page has four inputs. You pick a puzzle, paste a scramble, then set a maximum move count and a maximum node count (in millions). Most free cube solvers hide their search budget. Here you control it directly, so you can trade a shorter solution against a longer search. Per the GitHub README, the solver returns "the shortest practical replay-verified solution found within explicit limits." The README also says every successful API solve comes back with replayVerified=true, meaning the project replays the solution against the scramble to confirm it actually solves the puzzle.
The README mentions search, heuristics, pruning tables and several solver strategies. It does not name a specific algorithm such as Kociemba's two-phase method, and the site does not publish average move counts or solve times. You get a promise that the result is verified, and no figures on how good that result usually is.
Visualization (partial)
The solver page shows the message "Visualization is not available for this puzzle yet." Some puzzles get a visual and others don't. If you depend on seeing the cube state to follow a solution, check your puzzle before committing to the tool.
Timer, learning pages and records
The navigation lists a Timer next to the Solver, a Learn section covering Notations and Algorithms, and a World Records page under Records and Data. An Explore section links out to YouTube channels, sites and stores. None of this is unusual for a cubing site, but having all of it on one free domain is convenient for a hobbyist.
API
Two APIs appear in the docs. The site hosts an unofficial WCA Data API at version 0.1.0 with a status endpoint. The GitHub project ships a Rust HTTP API (built on Axum) with /health, /puzzles, POST /solve and POST /solve-scan endpoints. The README also describes an optional YOLO-based camera scanner written in Python, which feeds the scan endpoint. If you want to self-host, the repo includes Docker Compose and requires Node.js 24+, a Rust toolchain and Python 3.14+ for the scanner.
Pricing Breakdown
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | Online solver, timer, notation and algorithm pages, world record data, API docs. No signup visible on the homepage. |
| Self-hosted | $0 (your infrastructure) | Full source under the MIT license, Rust API, React web UI, optional camera scanner. |
No paid tier appears on the site. The MIT license means you can fork the code, run it commercially or embed it, with no paid dependency found. Pricing value scores 10/10 in the scored.tools criteria. The only real cost is your time if you self-host, given the three-language stack.
Pros & Cons
Pros
- Free in the browser, with no signup visible on the homepage.
- Max moves and max nodes are user-facing settings, so you can see and tune the search budget.
- Solutions are replay-verified, per the README, which guards against outright wrong answers.
- MIT-licensed source on GitHub with a documented HTTP API you can self-host.
- Timer, learning pages and record data sit on the same site.
Cons
- Visualization is missing for some puzzles, according to the solver page itself.
- Neither the homepage nor the README list which puzzles are supported in plain terms.
- No published accuracy, move-count or speed figures to check the vendor's claims against.
- Adoption is tiny. The GitHub repo had 5 stars at the time of scoring.
- The WCA Data API is at v0.1.0, which reads as early and subject to change.
- Analytics load only after cookie consent, which is fine for privacy, though it means the site is tracking page and tool usage once you accept.
Scores
| Criterion | Score | Why |
|---|---|---|
| Output quality | 4/10 | Low adoption on GitHub, visualization gaps, and solution quality claims come only from the vendor. |
| Ease of use | 9/10 | Instant browser access with no signup. Enter a scramble and get a solution. |
| Pricing value | 10/10 | Free, MIT licensed, no paid dependency found. |
| API & integration | 5/10 | Documented WCA Data API and a Rust HTTP API, both early-stage with few integrations. |
| Problem fit | 5/10 | The solver goal is described only by the vendor, and missing visuals limit some puzzles. |
| Overall | 6.6/10 |
Who Is It For
The best fit is a hobbyist cuber who wants a quick solution for a scramble and likes having a timer and algorithm reference on the same site. The exposed move and node limits will appeal to anyone curious about how search depth changes the result.
Developers get more from the GitHub repo than from the hosted page. A Rust solver with an HTTP API, replay verification and an MIT license is a reasonable base for a cubing app, a Discord bot or a camera-scan experiment. Expect to read the code to learn which puzzles it handles and how it searches, because the docs don't spell either out.
Look elsewhere if you need documented guarantees: published move-count averages, a named algorithm, or a maintained API with a stable version. Coaches and content creators who rely on clear visual walkthroughs should also check that their puzzle has visualization before building around it.
Verdict
Rubiks Cube Solver is a free, open solver with honest controls and a useful set of side tools for speedcubers. Ease of use and price are its strengths. The weak spot is evidence. The project publishes no benchmarks, says little about supported puzzles, and has almost no outside adoption to lean on, which is why output quality scores 4/10.
Recommendation: use it if you're a hobbyist who wants a no-signup solver and timer in one tab, or a developer looking for an MIT-licensed Rust solver to fork. Before you depend on it for anything public, read the GitHub README, confirm your puzzle is supported, and check a few solutions against a solver you already trust. At $0, the cost of trying it is close to nothing.
