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Developer Tools
Format, validate and compare JSON, convert JSON to CSV, tidy XML, encode or decode Base64 and convert Unix timestamps. The Skills Library collects revised AI agent skills. Every tool is free to use and needs no account.
- Base64 Encoder & Decoder Decode Base64 into UTF-8 text or download the original bytes. Encode text or a local file as standard Base64 or Base64URL in your browser.
- JSON Diff Compare two JSON documents, review added, removed and changed values by path, and copy or download a change summary. Both documents stay in your browser.
- JSON Formatter & Validator Format, minify and validate JSON in your browser. Keep original number literals, property order and duplicate keys. Explore smaller documents in a collapsible tree.
- JSON to CSV Converter Convert JSON to CSV or Excel and CSV back to JSON in your browser. Choose which nested array becomes rows, preview the columns and keep large IDs exact.
- Skills Library Discover revised AI agent skills with version history, source attribution and evaluation results. Download published SKILL.md files and maintain future revisions in the workspace.
- Unix Timestamp Converter Convert Unix seconds or milliseconds to UTC and local dates, or convert ISO dates with an explicit offset to Unix time. Process a list and download a CSV.
- XML Formatter & Validator Format, minify and check well-formed XML in your browser. Preserve mixed content, CDATA, comments and xml:space regions. Copy or download UTF-8 XML.