# DevTools by developers.do

> A privacy-focused collection of free developer tools that run 100% client-side in your browser. No backend, no data collection, no tracking. All processing happens locally.

DevTools provides essential utilities for developers including hash generators, JSON formatters, code converters, AI-powered text analysis, and security tools. Every tool works offline after initial page load and never transmits user data.

## Tools

- [SHA-256/512 Hash Generator](https://developers.do/tools/sha256-generator): Generate secure SHA-256 or SHA-512 cryptographic hashes from text
- [SHA-1 Hash Generator](https://developers.do/tools/sha1-generator): Generate SHA-1 hashes from text (for checksums, not security)
- [MD5 Hash Generator](https://developers.do/tools/md5-generator): Generate MD5 hashes from text
- [JWT Decoder](https://developers.do/tools/jwt-decoder): Decode and inspect JWT tokens without sending data to a server
- [Secrets Scanner](https://developers.do/tools/secrets-scanner): Scan text, logs, or configs for leaked API keys and tokens
- [Password Generator](https://developers.do/tools/password-generator): Generate secure random passwords with customizable options
- [UUID Generator](https://developers.do/tools/uuid-generator): Generate UUIDs (v4) for unique identifiers
- [JSON Prettifier](https://developers.do/tools/json-prettifier): Format and validate JSON data
- [XML Prettifier](https://developers.do/tools/xml-prettifier): Format and validate XML data
- [Base64 Encoder/Decoder](https://developers.do/tools/base64-encoder): Encode and decode Base64 strings
- [JSON to TypeScript](https://developers.do/tools/json-to-typescript): Convert JSON to TypeScript interfaces
- [JSON to C#](https://developers.do/tools/json-to-csharp): Convert JSON to C# classes
- [JSON to Swift](https://developers.do/tools/json-to-swift): Convert JSON to Swift structs
- [JSON to Kotlin](https://developers.do/tools/json-to-kotlin): Convert JSON to Kotlin data classes
- [JSON to Go](https://developers.do/tools/json-to-go): Convert JSON to Go structs
- [JSON to Rust](https://developers.do/tools/json-to-rust): Convert JSON to Rust structs
- [Color Picker](https://developers.do/tools/color-picker): Pick colors and convert between HEX, RGB, HSL, HSV, and CMYK

## AI Tools

- [JS Tokenizers](https://developers.do/tools/js-tokenizer): Tokenize text using various AI tokenizers (runs in browser via WASM)
- [RAG Chunker](https://developers.do/tools/rag-chunker): Split text into retrieval-friendly chunks with overlap and token counts
- [Sentiment Analysis](https://developers.do/tools/sentiment-analysis): Analyze emotional tone of text using in-browser AI
- [Zero-Shot Classification](https://developers.do/tools/zero-shot-classification): Classify text into custom categories without training
- [Sentence Similarity](https://developers.do/tools/sentence-similarity): Generate embeddings and find semantic similarity between texts
- [Question Answering](https://developers.do/tools/question-answering): Answer questions based on provided context
- [Fill-Mask Text Completion](https://developers.do/tools/fill-mask): Complete sentences and predict missing words
- [Text Summarization](https://developers.do/tools/text-summarization): Summarize long text into concise overviews
- [Text Extractor](https://developers.do/tools/text-extractor): Extract emails, URLs, IPs, dates, and patterns from text

## Optional

- [QR Code Generator](https://developers.do/tools/qr-code-generator): Generate QR codes from text or URLs
- [Lorem Ipsum Generator](https://developers.do/tools/lorem-ipsum-generator): Generate placeholder text for designs
- [Random Number Generator](https://developers.do/tools/random-number-generator): Generate random numbers with code samples
- [File Size Converter](https://developers.do/tools/file-size-converter): Convert file sizes between SI and IEC units
- [Stacktrace Formatter](https://developers.do/tools/stacktrace-formatter): Format stack traces from multiple languages
- [API Tester](https://developers.do/tools/api-tester): Test and view API responses
- [iOS App Lookup](https://developers.do/tools/ios-app-lookup): Look up iOS app metadata by bundle ID

## Apps

- [Terremoto](https://terremoto.developers.do): iOS app for tracking earthquakes in real-time
- [FedPulse](https://fedpulse.developers.do): iOS app to search, save, and track federal government jobs
- [FAA Part 107 Quiz Prep](https://part107.developers.do): iOS app for FAA Part 107 drone pilot certification exam preparation
- [Citizenship Test Prep](https://citizenshiptest.developers.do): iOS app for US citizenship naturalization test preparation