Developer Tools Tools & Guides

Bulk UUID Generator – Generate Hundreds of UUIDs for Test Fixtures

Learn how to generate batches of UUIDs for database seeding, test fixtures, and mock data. Covers UUID v4 and v7, output formats, and collision probability at scale.

HEX ↔ RGB ↔ HSL Color Converter

Convert colors between HEX, RGB, and HSL, build palettes, and ensure accessible contrast. Includes CSS snippets and WCAG guidance.

Compare API Responses Online – Debug Breaking Changes Between Versions

Learn how to compare REST API responses to find breaking changes, regressions, and contract violations. Covers JSON normalization, dynamic field handling, and API versioning workflows.

Compare Text Online – Diff Checker Tool Guide

Learn how to use an online diff checker to compare two text blocks, spot code changes, and catch config mismatches — with line-by-line highlighting and practical examples.

.env File Editor – Keep Environment Variables Consistent

Standardize .env files across dev, staging, and production. Learn how to sort keys, deduplicate secrets, and avoid missing variables.

IP Lookup Tool – Find Location, ISP, ASN

Investigate IPv4 and IPv6 addresses from audit logs. Learn how to retrieve geolocation, ASN, ISP, and reverse DNS without leaving your browser.

MD5 vs SHA-256 vs SHA-512 – Choosing the Right Hash Algorithm

Compare MD5, SHA-1, SHA-256, and SHA-512 by speed, output length, collision resistance, and use case. Learn when MD5 is acceptable and when only SHA-256 or stronger will do.

Regex Tester Email Validation – Reduce False Positives in Signup Forms

Learn how to test and refine email validation regex patterns interactively. Catch false positives rejecting plus aliases and new TLDs before the pattern ships to production.

Regex Tester Lookahead Debugging – Fix Competing Assertions

Learn how to debug regex lookahead failures when competing assertions prevent the engine from reaching the capture group. Test patterns interactively with live match visualization.

Regex Tester Multiline Logs – Extract Stack Traces Accurately

Learn how to write and test regex patterns for multiline log parsing. Handle stack traces and wrapped error messages with the correct flags and anchors in a live tester.

Regex Tester Online – Test & Debug Regular Expressions Easily

Learn how to write and debug regular expressions with a live regex tester. Covers \\d+, email patterns, named groups, flags, and the most common regex mistakes.

SHA-256 File Checksum – Verify Downloads Are Untampered

Learn how to verify file integrity using SHA-256 checksums. Confirm that downloaded binaries, packages, and artifacts match their published hashes before running them.

Timestamp Converter Epoch to ISO 8601 – Align Analytics and CRM Events

Learn how to convert Unix epoch timestamps to ISO 8601 format so product analytics and CRM data align on a common timeline. Free browser-based timestamp converter.

Timestamp Converter Milliseconds to Seconds – Normalize Mixed Metrics

Learn how to convert epoch milliseconds to seconds when one service emits ms and another expects seconds. Fix the 1000x spikes that appear in dashboards when units are mixed.

Unix Timestamp Converter – Epoch to Date Tool

Learn what Unix timestamps are, how to convert epoch time to a human-readable date, and how to debug timestamp issues in logs, APIs, and JWT tokens — with instant browser tools.

Timestamp Converter Timezone Drift – Reconcile Regional Incident Timelines

Learn how to convert timestamps across timezones so distributed teams agree on event order during incident response. Eliminate debate caused by regional dashboard screenshots.

ULID vs UUID – Choosing the Right Sortable ID Format

Compare ULID, UUID v4, and UUID v7 for database primary keys and distributed IDs. Understand sortability, encoding, size, and library support to choose the right format.

UUID Generator Online – Create Unique IDs Instantly

Learn what UUIDs are, the difference between v1, v4, and v7, when to use them over auto-increment IDs, and how to generate cryptographically random UUIDs instantly in your browser.

UUID v4 vs UUID v7 – Which Version to Use for Database Keys

Learn the difference between UUID v4 and UUID v7. Understand why v7's time-ordered format improves database index performance and when v4's random structure is still the right choice.

What Is My IP Address? Find Your Public IP Instantly

Instantly find your public IPv4 or IPv6 address, ISP, location, and timezone. Learn what your IP reveals, how to check it, and how to hide it. Free browser tool.