A collection of browser-based developer utilities
Transform CSV data using AI-generated JavaScript functions without uploading your data to any LLM service.
Decode JWT tokens, edit header and payload sections, and reconstruct tokens with modified values.
Format, lint, and validate JSON with optional JSON Schema validation. Save and load named documents to browser local storage.
Query DNS records for any domain using DNS-over-HTTPS. Supports A, AAAA, MX, TXT, NS, CNAME, and more.
Convert markdown to formatted content that can be pasted directly into Google Docs with preserved formatting.
Count words in text with support for ignoring content within square brackets and treating numbers as words.
Paste any text containing CSS colour values and get a visual list of all colours found, with swatches. Supports hex, rgb/rgba, and hsl/hsla.
Compare two Psalm array type definitions from error messages and identify the differences between them.
Work with CSV or TSV data: extract a single column, sort it, filter to unique values, wrap values with custom templates, or convert SQL command-line table output into CSV.
Transform SQL SELECT output into INSERT statements for easy data duplication.
Generate random JavaScript code filled with anti-patterns and bad practices. Perfect for code review training and refactoring demos.
A randomised bingo card of things that happen during the Eurovision Song Contest. Tap each square as you spot them while watching the show.
For additional encoding and decoding tools, check out Cryptii.