Developer Tools
Browse our collection of Developer utilities.
New
LLM API Cost Calculator
Compare what a workload costs across Anthropic, OpenAI, Google and xAI, including prompt caching, batch rates and long-context tiers.
Try Tool
New
Token Counter & Context Visualizer
Paste a prompt or file to estimate its token count, see how much of each model's context window it fills, and what it costs to send.
Try Tool
New
Subdomain Finder
Find every subdomain of a domain from public Certificate Transparency logs and passive DNS, then check which ones still resolve.
Try Tool
New
Favicon Finder
Look up the favicon for any domain and preview it from Google, DuckDuckGo, and the site's own favicon.ico. Copy the direct link or download the icon.
Try Tool
Popular
JSON Parser & Formatter
Validate, format, and minify JSON data with error highlighting.
Try Tool
XML Formatter & Beautifier
Beautify and minify XML code with syntax highlighting.
Try Tool