Developer Toolkit

Encode and decode Base64, Base64URL, URLs, HTML entities, Unicode, hex, binary, ASCII, and UTF-8 locally.

Format, validate, visualize, query, diff, flatten, convert, and generate types from JSON locally.

Explore JSON as an interactive tree with search, JSONPath copying, and structure statistics.

Generate typed models, schemas, and structs from JSON across popular languages.

Evaluate JSONPath expressions against JSON and inspect matched results.

Validate JSON data against JSON Schema and inspect detailed Ajv errors.

Flatten nested JSON into path keys or unflatten path-key objects back into nested JSON.

Parse cURL commands and convert them into client-side HTTP code snippets.

Build, import, and export API requests locally without executing them.

Build HTTP requests and generate client code without sending the request.

Convert CSV to JSON or preview delimited data as a table.

Edit, preview, analyze, convert, and build Markdown documents locally with sanitized GitHub-Flavored Markdown preview.

Preview Markdown or strip formatting to plain text.

Sort environment keys, convert to JSON, or mask secret values locally.

Decode, encode, and parse URLs or query strings.

Inspect UUID versions, normalize casing, and remove dashes.

Convert Unix timestamps to local, UTC, and ISO dates.

Test, replace, explain, and reference JavaScript regular expressions locally.

Test regular expressions against sample text with live matches and groups.

Compare text, JSON, YAML, XML, and Markdown locally with semantic reports and exports.

Compare original and modified text with Monaco inline or side-by-side diffs.

Format and minify SQL queries across common database dialects.

Validate cron expressions and preview upcoming execution times by timezone.

Generate UUID v4 values with configurable casing and hyphen options. Validate pasted UUIDs.

Generate secure passwords and estimate their strength entirely in the browser.

Decode, verify, generate, compare, audit, and timeline JWTs locally in the browser.

Generate secure random strings with configurable character sets and batch counts.

Generate SHA hashes and optional HMAC signatures with the browser Web Crypto API.

Format, minify, and inspect structured JSON payloads.

Format YAML and convert YAML documents to JSON.

Decode JSON Web Token header and payload data locally.

Decode Base64 encoded text into readable output.