Browser-side workshop
Shape data.
Ship faster.
Fast, free tools for developers. — a hundred small utilities that run locally, like bench tools in your IDE.
● no signup · free · stays in your tab
Popular tools
What most devs reach for first — JSON, JWT, encoding, IDs, and time.
JSON & Data
JSON Formatter
Format and beautify JSON online for free.
JSON & Data
JSON Validator
Check whether a payload is valid JSON.
JWT & Security
JWT Decoder
Decode a JWT header and payload without verifying.
Encoding & Text
Base64 Encoder
Encode text as Base64.
Regex
Regex Tester
Run a regular expression against a string.
IDs & Random Data
UUID Generator
Generate RFC 4122 version 4 UUIDs.
Date & Time
Unix Timestamp Converter
Convert unix time, millis, or date strings.
Encoding & Text
URL Encoder
Percent-encode text for URLs.
JWT & Security
Password Text Cipher
Encrypt and decrypt text with a case-sensitive password using AES-256-GCM in your browser.
Browse by craft
Pick a lane — JSON, Git, security, DevOps — and stay in flow.
JSON & Data
Format, validate, convert, and inspect structured data.
Encoding & Text
Encode, decode, hash, and transform text.
IDs & Random Data
Generate UUIDs, passwords, and random strings.
JWT & Security
Inspect tokens, hashes, and security-related payloads.
Git & GitHub
Helpers for commits, ignores, diffs, and GitHub workflows.
Regex
Test, explain, and escape regular expressions.
Date & Time
Timestamps, timezones, cron, and date math.
SQL & Database
Format SQL and convert between queries and data.
Web & API
HTTP, cURL, URLs, and API payloads.
Docker & DevOps
Compose files, env files, and cluster YAML helpers.
AI
AI-assisted developer tools. Serverless later, never client API keys.
Everyday essentials
Converters, hashes, SQL, cURL, and cron — still 100% in the browser.
JSON & Data
YAML → JSON
Convert YAML into JSON.
Encoding & Text
HTML Encoder
Escape HTML entities.
JWT & Security
SHA-256 Hash
SHA-256 digest for security payloads.
Web & API
cURL Generator
Build a curl command from JSON.
Web & API
CORS Checker
Probe a URL for Access-Control headers from your browser.
SQL & Database
SQL Formatter
Indent SQL and uppercase keywords.
Date & Time
Cron Expression Explainer
Explain a 5-field cron expression.