Developer tools
UUID generator and JSON formatter that run entirely in your browser.
2 tools
UUID generator
Generate up to 100 random version 4 UUIDs in your browser, in upper or lower case, with or without hyphens or braces, and check whether a value is a valid UUID.
JSON formatter & validator
Pretty-print, minify or validate JSON in your browser. Errors are shown with the exact line and column, and you can sort keys and choose the indentation.