Local-only · no uploads · no tracking
Free micro-tools.
27 client-side utilities that run entirely in your browser. Once loaded, most work fully offline.
JSON Formatter
Validate and format JSON
→T.02JSON to CSV
Convert JSON arrays to CSV
→T.03Base64 Encoder
Encode and decode Base64
→T.04URL Encoder
Encode and decode URLs
→T.05UUID Generator
Generate random UUID v4
→T.06Password Generator
Generate secure passwords
→T.07Word Counter
Count words and characters
→T.08Case Converter
Convert text case
→T.09Markdown Preview
Preview Markdown in real time
→T.10Regex Tester
Test regular expressions
→T.11Timestamp Converter
Convert Unix timestamps
→T.12QR Code Generator
Generate QR codes
→T.13Color Contrast Checker
Check WCAG contrast ratios
→T.14Image Compressor
Compress images in-browser
→T.15UTM Builder
Build UTM campaign URLs
→T.16JWT Decoder
Decode JSON Web Tokens
→T.17Cron Parser
Parse cron expressions
→T.18SQL Formatter
Beautify SQL queries
→T.19YAML ↔ JSON
Convert between YAML and JSON
→T.20Text Diff
Compare two text blocks
→T.21Hash Generator
MD5, SHA-1, SHA-256, SHA-512
→T.22ULID Generator
Sortable unique identifiers
→T.23Subnet Calculator
IPv4 CIDR calculations
→T.24Schema Validator
Validate JSON against schemas
→T.25Token Counter
Count LLM tokens
→T.26License Checker
Can I use this license commercially?
→T.27TCO Calculator
Self-host vs SaaS cost comparison