7 tools
Developer Tools
Small local-first utilities for formatting, testing, generating, and comparing data.
These tools are intentionally small. They are for the tasks that interrupt development: checking a regex, comparing two snippets, generating a temporary identifier, encoding a payload, or creating a QR code for a test device.
The tools run in the browser and are best used for quick, low-friction work. For sensitive production secrets, use your team-approved password manager, secret store, or audited command-line workflow.
Generate
Create local assets and identifiers without opening a heavier tool.
3 tools
QR
Generate
QR Code Generator
Generate and customize QR codes for URLs, WiFi credentials, email, contacts, and plain text.
Create a QR code for a local test URL so a phone can open a development build.
PW
Generate
Password Generator
Generate strong passwords and passphrases locally with length, character, and strength controls.
Create a one-off password for a test account, staging system, or throwaway credential.
ID
Generate
UUID Generator
Generate random UUID v4 identifiers in bulk for tests, fixtures, database rows, and mock data.
Create mock IDs for API examples, fixtures, seed data, or documentation.
Inspect and test
Check patterns, colors, and text changes while you are working.
3 tools
/.*/
Inspect and test
Regex Tester
Test JavaScript regular expressions with live match highlighting, flags, and match details.
Validate a pattern before using it in frontend validation, scripts, or log parsing.
HEX
Inspect and test
Color Picker
Pick colors, inspect HEX, RGB, and HSL values, and check WCAG contrast ratios.
Check whether text and background colors meet WCAG contrast expectations.
DIFF
Inspect and test
Diff Viewer
Compare two blocks of text and inspect additions, deletions, and changed lines locally.
Compare copied config snippets before and after a change.
Transform
Convert data formats for debugging, documentation, and quick handoffs.
1 tool