Text and data tools for quick checks
zer.ai helps with everyday text operations such as word counting, checking strict limits with the Character Counter, case conversion, duplicate-line removal and whitespace cleanup. Paste text directly into the tool or open a file when supported.
Format and convert structured data
JSON Formatter, JSON Validator, CSV to JSON, JSON to CSV, XML Formatter and YAML tools help inspect data before it is copied into an application or development workflow. Validate the result after conversion, especially when the source contains unusual quoting or nested values.
Local processing for pasted content
Text and data operations run in the browser and are designed for quick, private checks. Do not paste secrets, access tokens or confidential production data into any online tool unless your organization allows it.
Developer identifier generators
Create random UUID v4 values with the UUID Generator, or use the Online GUID Generator for Windows-friendly uppercase, hyphen and brace formats. Time-sortable UUID v7 and ULID values are useful for ordered database keys, while the fixed nil UUID provides a standardized empty placeholder. Browse all five options in the Identifier Generators directory.