Developer Tool Categories
174+ free browser-based developer tools organized into focused categories. Pick a category to see every tool in it with guides and FAQs, or search from the home page.
JSON Tools
A complete set of free online JSON tools for developers — format, validate, diff, query and convert JSON entirely in your browser. Every tool runs client-side, so your payloads never leave this page.
Config & Serialization
Convert between every common configuration and data-interchange format — YAML, TOML, XML, JSON, CSV, .env, Java .properties and INI — with free browser-based tools. The matrix runs in both directions, so you can migrate a Spring Boot config, flatten a document into a spreadsheet or generate SQL from a CSV export without uploading anything.
Text Tools
Free online text tools for developers — convert case, count words, find and replace, generate lorem text, translate Morse code and more. All processing runs locally in your browser.
Regex Tools
Free online regular expression tools — test, explain, build replacements and reference a cheatsheet. Prototype patterns and verify backreference behavior entirely in your browser.
Hashing & Crypto Tools
Free online cryptography tools for developers — generate MD5/SHA/BLAKE2 hashes, HMACs, bcrypt and PBKDF2 keys, JWTs, JWKs, TOTP codes and OAuth PKCE challenges. All operations run client-side.
Encoding & Decoding Tools
Free online encoding and decoding tools — Base64, Base32, Base58, Base64URL, hex, Base64 ↔ hex, URL, HTML entities, Unicode escapes, gzip and file-to-base64. Convert between representations 100% in the browser.
CSS Tools
Free online CSS generators and tools — gradients, shadows, flexbox, grid, cubic-bezier, keyframes, clip-path, filters, transforms and minifier. Visual editors output copy-paste CSS, all in your browser.
Color Tools
Free online color tools for developers and designers — convert between hex/RGB/HSL, pick colors from images, generate palettes, check contrast and simulate color blindness. All in your browser.
Image Tools
Free online image tools — compress, scale up, convert SVG to PNG, generate QR codes, barcodes, favicons and placeholder images. All processing happens in your browser, no uploads.
Network & HTTP Tools
Free online network, HTTP and API-schema tools — parse HTTP headers and status codes, URLs, IPv4 subnets, MAC addresses, user agents and MIME types, convert curl to code, and generate Protobuf, GraphQL and OpenAPI definitions from a sample response. All client-side.
Validators & Extractors
Free online validators and extractors — validate email, credit card, IBAN, ISBN, UUID and SQL, and extract emails, URLs and phone numbers from text. All checks run in your browser.
DevOps & Date/Time Tools
Free online DevOps and date/time tools — timestamp and timezone converters, cron builders and parsers, git cheatsheets, gitignore and commit message generators, chmod and semver calculators. All client-side.
Generators & IDs
Free online generators for IDs and random data — UUID, ULID, NanoID, BSON ObjectId, random bytes and numbers, mock data and password generators. Output is produced locally in your browser.
Developer Utilities
Free online developer utilities — code beautifier, SQL formatter, diff, keycode and ASCII reference, number base/IEEE 754/bitwise tools, LLM cost and token counters and AI text detection. All in your browser.