Developer Utilities — Timestamp, UUID, ULID & More
Thirteen browser-based utilities for everyday engineering work: Unix timestamps, UUID, ULID, Nanoid, cron next runs, regex testing, password generation, slugify, number-base conversion, case conversion, text diff, chmod, and Lorem Ipsum. For encoding helpers see Base64.
- Generate timestamps, UUIDs, ULIDs, and Nanoids.
- Parse cron, test regex, diff text, and generate Lorem Ipsum locally.
- Slugify strings, convert cases, and compute chmod bits.
UUID Generator
Generate UUID v4, v7, or nil with hyphen, case, and bulk count options.
ULID Generator
Generate time-sortable Crockford Base32 ULIDs with Web Crypto — uppercase, monotonic option, bulk count 1–50.
Nanoid Generator
Generate Nanoid-style IDs (URL-safe, alphanumeric, or numeric) with size presets.
Unix Timestamp
Convert epoch seconds or milliseconds to ISO dates and back — UTC or local timezone.
Cron Parser
Parse 5- or 6-field cron expressions and list the next fire times.
Regex Tester
Test JavaScript regular expressions with flags, groups, and replace preview.
Slugify
Turn titles into URL-safe slugs with separator, casing, and length options.
Case Converter
Convert between camelCase, PascalCase, snake_case, SCREAMING_SNAKE, and kebab-case.
Text Diff
Compare two free-text blobs side by side line by line — complements JSON Diff.
Lorem Ipsum Generator
Placeholder text with themes, Plain/HTML/Markdown/JSON formats, and optional hierarchical headings.
Password Generator
Generate strong passwords with CSPRNG — length, charset, and ambiguous exclusion.
Number Base Converter
Convert integers between bases 2–36 with optional byte endianness for hex/bin.
Chmod Calculator
Toggle ugo rwx ↔ octal and read ls-style symbolic notation (setuid/setgid/sticky).
Guides
Secure Password Generator Online: 2026 Best Practices
Length, entropy, symbols: generate a strong password in your browser with Web Crypto, no network transit, and know what the tool does not guarantee.
Online Regex Tester: A Practical Guide to Debugging Regular Expressions
Test a JavaScript regex, inspect capture groups, and preview a $1 replace in the browser before the pattern lands in production code.
UUID vs ULID vs Nanoid: Which Unique ID Should You Use?
Random UUID v4, sortable UUID v7 and ULID, or compact customizable Nanoid: a comparison and online generators for primary keys, public IDs and tokens.