LaboratorU
Developer data
Formatters, encoders, UTM builders, CSS converters, and data workflow tools.
JSONFormat, validate, and minify JSON locally in your browser.URL EncodeEncode or decode URL text locally without sending it anywhere.Base64Encode and decode Base64 text locally with Unicode-safe handling.CSV to JSONConvert simple CSV tables into JSON arrays locally in your browser.JSON to CSVConvert an array of JSON objects into CSV locally in your browser.JSON DiffCompare two JSON documents by parsed path locally, ignoring whitespace and key order.JSON SchemaValidate JSON against a small local JSON Schema subset for quick contract checks.JSON/YAML/TOMLConvert JSON and simple YAML/TOML mappings locally with visible subset caveats..env to JSONConvert pasted KEY=value config into JSON locally while keeping values as strings.SQLFormat common SQL snippets locally for readability without a server-side parser.JWTDecode JWT header and payload locally without verifying the signature.ColorConvert HEX and RGB colors into HEX, RGB, and HSL values locally.UTMBuild campaign URLs with UTM parameters locally.Email SignatureBuild a clean HTML email signature locally from pasted contact fields.JSON-LDGenerate common Schema.org JSON-LD blocks locally from pasted fields.Meta/OG PreviewGenerate or inspect page meta, Open Graph, and social preview tags locally.curl to CodeConvert common curl commands into fetch and Python requests snippets locally.CSS UnitsConvert CSS px, rem, and em values with a configurable base size locally.