Timestamp Converter
Convert Unix timestamps to human-readable dates and back, in seconds or milliseconds. Live epoch clock, ISO 8601, UTC, and any timezone — free and fully in-browser.
Open tool
19 个工具
Developer 工具
完全在浏览器中运行的免费在线 developer 工具。
Time Zone Converter
Compare up to 4 time zones side-by-side with a live 24-hour grid. Search by city, country, IANA, or abbreviation (GMT, NPT, IST, EST). Star favorites, pick a meeting time that works everywhere.
Open tool
Number Base Converter
Convert binary, decimal, octal, and hexadecimal values with grouped formatting and optional bit-length padding.
Open tool
JSON Formatter
Format and beautify JSON with proper indentation.
Open tool
IDN Punycode Converter
Convert Unicode domains to punycode and decode punycode back to internationalized domain names.
Open tool
UUID Generator
Generate random v4 UUIDs instantly — single or bulk.
Open tool
Random Number Generator
Generate random numbers with custom min/max range, decimal precision, and batch output for analytics, testing, and simulations.
Open tool
Random String Generator
Create random strings with configurable character sets, optional prefix/suffix, and exclusion of ambiguous characters for safe IDs.
Open tool
JWT Decoder
Decode and inspect JSON Web Tokens without verification.
Open tool
Regex Tester
Test regular expressions against text with live match highlighting.
Open tool
README Badge Generator
Build shields.io badges for npm, GitHub Actions, Docker, PyPI, license, coverage, and custom labels — with live preview and copy-ready Markdown, HTML, or URL output.
Open tool
HTML Minifier
Shrink HTML by removing comments, collapsing whitespace, and stripping noise — without breaking the contents of <pre>, <textarea>, <script>, or <style>. Reports byte savings instantly.
Open tool
CSS Minifier
Compress CSS by stripping comments, collapsing whitespace, and removing redundant semicolons. Outputs production-ready CSS with byte savings reported.
Open tool
JavaScript Minifier
Strip comments and unnecessary whitespace from JavaScript so it ships in fewer bytes — with string and regex literals preserved exactly. Runs entirely in your browser.
Open tool
SQL Formatter / Beautifier
Format messy SQL into a readable, standard layout — uppercase keywords, one clause per line, indented JOINs and subqueries. Works with PostgreSQL, MySQL, SQLite, and SQL Server dialects.
Open tool
URL Parser
Break any URL into protocol, host, port, path segments, query parameters, and fragment. Includes one-click decoding and a copyable JSON view for debugging redirects, deep links, and tracking URLs.
Open tool
User Agent Parser
Paste any User-Agent string and instantly see the browser, engine, OS, device type, and version. Built for log triage, analytics QA, and bug reports.
Open tool
JSON Minifier
Strip whitespace from JSON to produce the smallest valid payload. Reports savings in bytes and percentage so you can see the impact instantly.
Open tool
Cron Expression Builder & Explainer
Build cron schedules with a step-by-step picker, then read the plain-English explanation, the next runs in any IANA timezone, and ready-to-paste snippets for crontab, Kubernetes CronJob, Spring @Scheduled, AWS EventBridge, and GitHub Actions. Standard, 6-field, and Quartz dialects (with L, W, # specials) all supported.
Open tool