A collection of essential developer tools built with privacy in mind. No backend. Tool data never leaves your browser. Anonymized analytics help improve the site.
- JS Tokenizers: Tokenize text using various AI tokenizers
- RAG Chunker: Split text into retrieval-friendly chunks with overlap and token counts
- Text Extractor: Extract emails, URLs, IPs, dates, and patterns from text
- Sentiment Analysis: Analyze emotional tone of text using AI
- Zero-Shot Classification: Classify text into custom categories without training using AI
- Sentence Similarity: Generate embeddings and find semantic similarity between texts using AI
- Question Answering: Answer questions based on provided context using AI
- Fill-Mask Text Completion: Complete sentences and predict missing words using AI
- Text Summarization: Summarize long text into concise overviews using AI
- JSON Prettifier: Format and validate JSON data
- XML Prettifier: Format and validate XML data
- HL7 Parser: Read and parse HL7 v2 messages into structured JSON
- HL7 to FHIR Converter: Convert HL7 v2 messages to FHIR R4 Bundles
- Diff / Text Compare: Compare two texts and see color-coded differences
- Stacktrace Formatter: Format and beautify stack traces from multiple programming languages
- Beautify Stack Trace: Clean up and beautify messy error stack traces for readability
- Stack Trace Analyzer: Analyze stack traces to identify root causes, explain errors, and separate app from framework code
- Base64 Encoder/Decoder: Encode and decode Base64 strings
- File Size Converter: Convert file sizes between decimal (SI) and binary (IEC) units
- Unix Timestamp Converter: Convert between Unix epoch timestamps and human-readable dates with timezone support
- URL Encoder / Decoder: Encode and decode URLs using encodeURIComponent and encodeURI
- YAML ↔ JSON Converter: Convert between YAML and JSON with auto-detection of input format
- SQL Formatter: Format and prettify SQL queries with support for MySQL, PostgreSQL, SQLite, and more
- String Similarity: Compare strings using Jaro-Winkler, Levenshtein, Dice, and Hamming algorithms
- Regex Tester: Test regular expressions with match highlighting, capture groups, and string replacement
- Regex Library: Browse and copy common regular expressions for validation, extraction, and text processing
- Number Base Converter: Convert numbers between binary, octal, decimal, and hex with two's complement
- Password Generator: Generate secure random passwords
- UUID Generator: Generate UUIDs (v4)
- Lorem Ipsum Generator: Generate placeholder text for designs
- Random Number Generator: Generate random numbers and see code samples in multiple languages
- QR Code Generator: Generate QR codes from text, URLs, or any data
- JSON to TypeScript: Convert JSON to TypeScript interfaces
- JSON to JSDoc: Convert JSON to JSDoc type definitions
- JSON to C#: Convert JSON to C# classes
- JSON to Swift: Convert JSON to Swift structs
- JSON to Kotlin: Convert JSON to Kotlin data classes
- JSON to Python: Convert JSON to Python dataclasses or Pydantic models
- JSON to Go: Convert JSON to Go structs
- JSON to Rust: Convert JSON to Rust structs
- Color Picker: Pick colors and convert between HEX, RGB, HSL, HSV, and CMYK formats
- Secrets Scanner: Scan text, logs, or configs for leaked keys and tokens
- JWT Decoder: Decode and inspect JWT tokens
- MD5 Hash: Generate MD5 hashes from text
- SHA-1 Hash: Generate SHA-1 hashes from text
- SHA-256/512 Hash: Generate secure SHA-256 or SHA-512 hashes from text
- Clawdbot Security Scanner: Audit Clawdbot/Moltbot/OpenClaw configs for security vulnerabilities
- SAML Decoder: Decode SAML Requests/Responses from Base64 to readable XML
- SAML Metadata Parser: Parse SAML Metadata XML and extract IdP/SP configuration
- SAML Certificate Inspector: Inspect X.509 certificates from SAML metadata, responses, or PEM
- CSR Decoder: Decode PKCS#10 CSRs and inspect subjects, SANs, extensions, and key details
- SAML Assertion Builder: Generate test SAML Responses, AuthnRequests, and LogoutRequests
- API Tester: Test and view API responses
- HTTP Status Code Reference: Searchable reference of all HTTP status codes with descriptions and use cases
- OSS Data: Open-source data tools for developers
- iOS App Lookup: Look up iOS app metadata from the App Store using bundle ID
- Terremoto: iOS app for tracking earthquakes in real-time
- FedPulse: iOS app to search, save, and track federal government jobs
- FAA Part 107 Quiz Prep: iOS app for FAA Part 107 drone pilot certification exam preparation
- Citizenship Test Prep: iOS app for US citizenship naturalization test preparation
- ClawPet: iOS virtual desktop pet that visualizes bot activity in real-time
Explore the live version of this DevTools suite at https://www.developers.do.
This site supports the llms.txt standard for AI discoverability:
/llms.txt- Concise overview of all tools/llms-full.txt- Detailed documentation for AI consumption
Ensure you have the following installed on your system:
- Git: For cloning the repository.
- Bun: The JavaScript runtime and package manager.
Follow these steps to get the application up and running on your local machine.
git clone https://github.com/hminaya/devtools/devtools.git
cd devtoolsbun installbun run devThe application will typically be accessible at http://localhost:3000 in your web browser.
By default, the application runs on port 3000. To customize it, copy the example environment file:
cp .env.local.example .env.localThen, you can edit the PORT variable inside your new .env.local file. This file is ignored by Git, so your local settings won't be committed.
In the project directory, you can run:
bun run dev: Runs the app in development mode.bun run build: Builds the application for production.bun run start: Starts the production server (after building).
You can build and run the app locally using Docker — no Bun or Node.js installation required.
docker build -t developers-do .docker run -p 8080:80 developers-doThe app will be available at http://localhost:8080.
The Docker build uses a two-stage process:
- Builder — installs dependencies with Bun and runs
bun run build, producing static HTML/CSS/JS in theout/directory. - Runner — copies the static files into an nginx image for serving. No Node.js or Bun is needed at runtime.
This project is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.