Online MCP Server Check, Agent Skill Builder & LLM API Tester

Base64 Text encoding and decoding URL Encode/Decode URL encoding and decoding JSON Editor Format and validate JSON Unicode Converter Inspect Unicode characters Length Calculator Count characters, words, lines, and bytes HTML Preview Live HTML preview Line Break Cleaner Clean line breaks and whitespace

Auth/API Debugging Tools Headers, tokens, params, and payload debugging JWT Decoder and Encoder Decode, verify, and encode tokens

AI Developer Tools AI workflow hub and live tools LLM API Tester Test OpenAI-compatible APIs directly from your browser AI Prompt Toolkit Prompt cleanup, redaction, and chunking Agent Skill Builder Build Claude or Codex SKILL.md files from Markdown Structured Output Playground Validate schema-shaped AI JSON AI CLI Tools Generate CLI commands for AI tools MCP Server Check Connect to remote MCP servers and inspect tools

Automation and Text Tools Automation/Text Ops tools and guides Unix Timestamp Epoch conversion Cron Parser Schedule parsing Regex Tester Pattern testing Diff Checker Text comparison

Markdown Editor Markdown Preview Mermaid Editor Render Mermaid diagrams as SVG or ASCII SQL to ER Diagram Generate ER diagrams from SQL DDL

Investigation Tools IP, domain, and subnet investigation IP Information Location and network lookup Domain / Whois WHOIS and DNS lookup CIDR Calculator CIDR subnet calculation

Hash Generator MD5, SHA-1, SHA-256 UUID Generator UUID generation QR Code Generator QR generation Emoji Picker Emoji search and copy Color Converter HEX/RGB/HSL conversion

Image Editor Image editing Image Resizer Image resizing Image Converter Image format conversion AI Watermark Inspector Inspect AI provenance metadata PNG Merger PNG layer merging

PDF to Image PDF to image conversion Image to PDF Image to PDF conversion PDF Merger PDF merging PDF Splitter PDF page extraction

Speech Playground Speech to text and text to speech Frame Capture Video frame extraction Audio Drop Extract audio from video Video Remuxer Video container conversion Video Splitter Video segment editing