Parse browser, operating system, and version from any User-Agent string. Detects Chrome, Firefox, Safari, Edge, and the client OS from request headers.
Generate random browser user-agent strings from a curated list covering Chrome, Firefox, Safari, Edge, and mobile browsers.
Find the ISO week number for any date. Also shows the day of the week and the current week of the year.
Hub page linking to standalone tools: Port Number Lookup, User-Agent Parser, Query String Parser, SSE Event Formatter, Rate Limit Header Parser, Pricing Tier Builder, SSH Key Generator, TOTP Generator, Unix Time Converter, Time Zone Converter, World Clock.
Calculates gross margin percentage, markup percentage, cost, and selling price from any two known variables — perfect for retail pricing, wholesale negotiations, and e-commerce product listing optimization where you need to work backwards from a target margin.
Divides total sales-and-marketing spend by the number of new customers acquired in the same period to produce a blended acquisition cost. Startups and growth teams use CAC to evaluate marketing channel efficiency, optimize ad spend, and benchmark against LTV.
User-Agent Parser lets you parse browser, operating system, and version from any User-Agent string. Detects Chrome, Firefox, Safari, Edge, and the client OS from request headers.. It works on any device with a modern web browser.
Parse browser, operating system, and version from any User-Agent string. Detects Chrome, Firefox, Safari, Edge, and the client OS from request headers. It's ideal for developers, designers, and anyone who needs to parse browser, operating system, and version from any user-agent string without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, User-Agent Parser runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.