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devtools

Encode special characters to HTML entities or decode HTML entities back to plain text, entirely in t

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes from text input, entirely in the brow

Parse and display CSV data as a sortable, interactive HTML table with automatic delimiter detection,

Convert CSV text to a JSON array of objects using a custom RFC-4180-compatible parser with configura

Parse and explain any cron expression with field-by-field breakdown, human-readable description, and

Build cron expressions visually from 5-field inputs with human-readable description and next-run pre

Generate harmonious 5-color palettes from a base color using six color theory schemes, entirely in t

Browser-based color-converter tool. Live demo at file-converter-free.com

Calculate WCAG contrast ratios between foreground and background colors and check AA/AAA accessibili

Convert YAML documents to JSON using the js-yaml library, entirely in the browser.

Validate JSON syntax and display a structural summary with live feedback, entirely in the browser.

Render JSON as an interactive collapsible tree with color-coded node types, entirely in the browser.

Convert JSON to YAML using the js-yaml library, entirely in the browser.

Convert a JSON array of objects to CSV format with proper quoting, entirely in the browser.

Remove whitespace and comments from CSS code to reduce file size, entirely in the browser.

Encode text to Base64 or decode Base64 strings back to plain text, entirely in the browser.

A collection of tools and scripts for use in software development workflows

Track AI spending across API providers, MCP tools, subscriptions, and self-hosted GPUs from your terminal. One CLI to see what you're actually paying — Anthropic, OpenAI, OpenRouter, vLLM on your own hardware — with real TCO math. Compare your self-hosted $/MTok vs cloud pricing. Local-first, no SaaS required.

Utils and dev tools for the Rensa ecosystem. https://devtools.rensa.projects.tf

Debugger/inspector for the Godot Editor, written in GDScript.