What is Crossword Solver?
Crossword Solver is a free, browser-based tool in the Games & Brain Training suite. Enter a crossword clue pattern with ? for unknown letters (e.g. c?t matches cat, cot, cut). The solver filters a built-in English word list and shows all matches.
The headline benefit: pattern-match against a built-in word list — fill in the blanks instantly.
Unlike most online tools that upload your file to a server, process it, and send it back, Crossword Solver runs entirely in your browser. Open DevTools → Network while using it and you'll see zero file-upload requests — only static assets (JavaScript, CSS, fonts) load. Your data never leaves your device.
Why use this crossword solver?
Three reasons EasyFileKit's Crossword Solver stands out from the crowd:
- **Private by design** — all processing happens locally via JavaScript and WebAssembly. No server ever sees your input.
- **Instant** — no upload wait, no queue, no server round-trip. Results appear the moment you act.
- **Free & unlimited** — no accounts, no watermarks, no daily caps. Use it as many times as you like.
How to use Crossword Solver — step by step
Here's the complete walkthrough. Everything happens instantly in your browser:
- **Step 1.** Type your pattern using letters and ? (or _ or .) for unknown letters.
- **Step 2.** Press Enter or click Find. All matching words from the built-in list appear.
- **Step 3.** Click an example pattern below the input to try it instantly.
- **Step 4.** Use “Copy all” to copy every match to your clipboard for pasting elsewhere.
That's it. No sign-up, no upload bar, no waiting. If something doesn't work as expected, check the FAQ below.
Common use cases for Crossword Solver
People reach for Crossword Solver in a few recurring situations:
- When you need the result **now** and can't wait for a server-based tool to upload, queue, and process your file.
- When your file is **private or sensitive** — financial documents, personal photos, medical PDFs — and you don't want it travelling across the internet.
- When you're on a **slow or metered connection** — uploading a 50 MB file just to compress it makes no sense when the same work can happen locally.
- When you've hit the **daily limit or paywall** on another "free" tool site.
Privacy: what actually happens to your data
This is the single most important point about Crossword Solver, so it deserves its own section.
When you use this tool, your input is processed by JavaScript running in your browser tab. The code is downloaded once (cached afterwards) and executes locally on your CPU. At no point is your file, your text, or your input data transmitted to any server.
You can verify this yourself in under 30 seconds:
- Open Crossword Solver in your browser.
- Press F12 to open DevTools.
- Switch to the Network tab and tick "Disable cache".
- Use the tool — drop a file, type text, whatever the tool needs.
- Watch the Network log. You'll see only static assets (JS, CSS, fonts, icons). No request contains your data.
This isn't a setting you toggle or a promise in a privacy policy — it's how the tool is architecturally built. There is no upload endpoint to call.
Frequently asked questions about Crossword Solver
Q: How big is the word list?
A: About 2,000 common English words are embedded directly in the page. It's not exhaustive (no proper nouns or rare words) but covers most everyday crossword answers.
Q: Can I use this for cryptic crosswords?
A: Pattern matching works for any crossword style — but cryptic clues require understanding the wordplay, which this tool doesn't do. Use it to fill in answers you've already figured out.
Q: What characters can I use as wildcards?
A: ?, _, and . all work as wildcards matching any single letter. Mixing letters and wildcards in any position is fine.
Q: Does it work for Scrabble?
A: For Scrabble you want all anagrams of a letter rack — use the dedicated Scrabble Word Finder tool instead, which sorts by score.
Q: Is the word list ever updated?
A: The list is bundled with the page. It will update whenever the site is redeployed. For ad-hoc lookups you can also paste in your own list and reuse the same pattern.
Crossword Solver: EasyFileKit vs server-based tools
Most "free" online tools that do what Crossword Solver does follow the same model: you upload your file to their server, they process it with a backend script, then they send the result back. Here's the honest comparison:
| | EasyFileKit | Server-based tools |
|---|---|---|
| **Your file leaves your device?** | Never | Yes, uploaded to a server |
| **Speed** | Instant (no upload) | Slower (upload + queue + download) |
| **Privacy** | Complete | Your file is on someone else's computer |
| **Cost** | Free, unlimited | Often capped or "premium" gated |
| **Works offline** | Yes (PWA) | No |
Server-based tools aren't evil — they exist because some tasks genuinely need heavy backend compute. But for everything Crossword Solver does, client-side processing is strictly better for you.
Under the hood: how Crossword Solver works
Crossword Solver is built with modern browser APIs. Depending on what it does, it may use:
- **Canvas API** — for image manipulation (pixel-level access, filters, resizing).
- **Web Crypto API** — native, hardware-accelerated cryptography (AES-GCM, SHA-256, PBKDF2) for any encryption or hashing.
- **pdf-lib / pdf.js** — fully client-side PDF creation and rendering.
- **MediaRecorder API** — for capturing screen, audio, and video.
- **WebAssembly** — for heavy codecs (image compression, media processing).
All of these run inside your browser's sandbox. They cannot access your filesystem (beyond files you explicitly choose), cannot make network requests with your data, and cannot run persistently in the background.
Pro tips for getting the most out of Crossword Solver
- **Bookmark the tool** — it works offline once cached, so you can use it even without a connection.
- **Install EasyFileKit as a PWA** — open the browser menu and choose "Install app" for a standalone window and offline access.
- **Use it on mobile** — every tool is fully responsive and works on phones and tablets, not just desktops.
- **No file size anxiety** — because nothing uploads, you can process large files that server-based tools would reject or charge for.
Try Crossword Solver now
The tool is right above this article — scroll up and start using it. No sign-up, no upload, no limits.
If you found Crossword Solver useful, explore the rest of the Games & Brain Training suite — there are more tools that work the same private, instant, free way. And if you have a question that isn't covered in the FAQ above, the About page has our contact email.