Free Web Utilities • Developer Tools

Web Developer
Utilities

Encode and decode URLs, look up IP addresses, parse user agent strings, build UTM tracking links, and reference HTTP status codes. Essential web utilities for developers and marketers.

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Free Web Utilities for Developers and Marketers

These web utilities cover the quick lookups and transformations that developers and marketers deal with all the time. Encode a URL so it is safe to pass as a query parameter, or decode one that came back garbled. Look up an IP address to see its location and provider details. Paste a user agent string to find out which browser and operating system it belongs to. Build a UTM link for a campaign without getting the parameter names wrong. Check what an HTTP status code means without searching the spec. Clean, accurate results every time.

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Frequently Asked Questions

Everything you need to know

We offer a User Agent Parser, IP Address Lookup, HTTP Status Code Reference, and Query String Builder — essential tools for web developers and network professionals.

Paste any user agent string (from server logs, browser headers, etc.) and our parser identifies the browser name, version, operating system, device type, and rendering engine.

Yes. Enter any IPv4 or IPv6 address to get its geolocation, ISP, ASN, timezone, and country information. Useful for debugging, analytics, and network troubleshooting.

It covers all standard HTTP status codes (1xx–5xx) with descriptions, common causes, and how to fix errors — a quick-reference guide for developers building and debugging web services.

Most utilities (user agent parser, HTTP reference, query string builder) are fully client-side. The IP lookup tool makes an anonymized API request to fetch geolocation data for the IP you enter.

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