Plain English → Production-Ready Code
28 free tools for developers — generate Regex, SQL queries, UUIDs, and passwords; decode JWTs and explain errors and code; format SQL and JSON; convert YAML, timestamps, and colors; diff any two texts. Fast, private, no signup required.
"emails only"
// → regex
^[\w.-]+@[\w.-]+\.\w+$
How it works
Every tool on Dev Brains AI follows the same three steps — no account, no configuration, no waiting.
Drop in your code, error message, or a plain-English description of what you need.
Each tool processes your input instantly in your browser or on our server — nothing is stored.
Copy the result straight into your project. Every tool page also explains how the output works, so you're not just copy-pasting blindly.
Generate
Turn a plain-English description into ready-to-use code, docs, or config.
Regex Generator
Convert plain English into regular expressions with readable explanations.
Open Regex Generator →Cron Generator
Describe your schedule in plain English and get the correct cron expression.
Open Cron Generator →README Generator
Fill in your project details and generate a polished README.md instantly.
Open README Generator →API Docs Generator
Describe an API endpoint and generate clean, structured documentation.
Open API Docs Generator →Unit Test Generator
Paste a function signature and get a ready-to-run test scaffold.
Open Unit Test Generator →Commit Message Generator
Describe your change and get a properly formatted Conventional Commit message.
Open Commit Message Generator →Docstring Generator
Paste a function signature and generate a JSDoc or Python docstring.
Open Docstring Generator →Explain
Paste something confusing and get a clear, plain-English breakdown.
Regex Explainer
Paste any regex and get a plain-English, token-by-token breakdown.
Open Regex Explainer →SQL Query Explainer
Paste a SQL query and get a clear explanation of what it does.
Open SQL Query Explainer →Code Explainer
Paste a code snippet and get a structural, plain-English walkthrough.
Open Code Explainer →Stack Trace Analyzer
Paste a full error stack trace and get the likely cause and fix.
Open Stack Trace Analyzer →Error Explainer
Paste an error message and get a human-readable explanation plus debugging steps.
Open Error Explainer →JWT Decoder
Decode a JWT’s header, payload, and expiry instantly — without sending it anywhere.
Open JWT Decoder →Convert & Format
Clean up, transform, or translate data between formats — all in your browser.
JSON Formatter
Pretty-print, validate, and minify JSON directly in your browser.
Open JSON Formatter →JSON Schema Generator
Paste example JSON and instantly generate a draft JSON Schema.
Open JSON Schema Generator →cURL to Code
Paste a curl command and get equivalent fetch, axios, or Python requests code.
Open cURL to Code →YAML ↔ JSON Converter
Convert YAML to JSON and back, with clear error messages for invalid input.
Open YAML ↔ JSON Converter →Markdown Previewer
Write markdown on the left, see the rendered result live on the right.
Open Markdown Previewer →Utilities
Everyday developer utilities — fast, private, and free.
Diff Checker
Compare two texts line by line and see additions and removals highlighted.
Open Diff Checker →Timestamp Converter
Convert unix timestamps to human dates and back, with a live epoch clock.
Open Timestamp Converter →Password Generator
Generate strong random passwords locally, with a live entropy meter.
Open Password Generator →Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes of any text instantly.
Open Hash Generator →Color Converter
Convert colors between HEX, RGB, and HSL with a live preview swatch.
Open Color Converter →Why Dev Brains AI
Every tool is free to use, with no account, no credit card, and no usage cap that pushes you toward a paid plan.
We don't store the text, code, or queries you paste in. Read the Privacy Policy for the full details.
Every tool page includes worked examples, explanations, and an FAQ — not just a bare input box — so you understand the output, not just copy it.
We regularly add new tools and publish new guides on the Blog covering regex, SQL, cron, JSON, and general developer workflow topics.