TOOLOO · DEVELOPER TOOLS

Developer tools, right in your browser

Format, convert, encode, and look up everyday developer data. Your input stays on your device.

Browser-onlyNo input upload

DEVELOPER LIBRARY

All tools

Search tools

Data format

JSON FormatterFormat, validate, and minify JSON with clear error positions.Format · Validate · Minify ↗JSON to YAMLConvert JSON into readable, copyable YAML configuration.Convert ↗YAML to JSONConvert common YAML configuration into standard JSON.Convert ↗JSON to CSVConvert a JSON array of flat objects into spreadsheet-ready CSV.Convert ↗CSV to JSONConvert CSV rows into a JSON array using the first row as headers.Convert ↗JSON to XMLConvert JSON into an indented XML document.Convert ↗XML to JSONConvert basic XML elements and text content into JSON.Convert ↗XML FormatterRe-indent XML by tag nesting so the structure is easy to read.Format ↗YAML FormatterNormalize YAML indentation and spacing into one consistent style.Format ↗

Web development

SQL FormatterBreak single-line SQL onto keyword-aligned lines for reading and review.Format ↗HTML FormatterRe-indent HTML by tag nesting so the structure is readable.Format ↗CSS FormatterExpand minified CSS into one declaration per line.Format ↗JavaScript FormatterRe-indent JavaScript by braces and semicolons to restore readability.Format ↗HTML MinifierStrip HTML comments and redundant whitespace to shrink output.Minify ↗CSS MinifierStrip CSS comments and whitespace down to a single line.Minify ↗JavaScript MinifierStrip JavaScript comments and whitespace while keeping the code runnable.Minify ↗

Encoding

Base64 Encoder / DecoderEncode and decode UTF-8 text as Base64 without leaving your browser.Encode · Decode ↗HTML Entity Encoder / DecoderConvert between HTML special characters and their entities.Encode · Decode ↗Unicode ConverterConvert between text and \uXXXX Unicode escape sequences.To escapes · To text ↗ASCII ConverterConvert between text and decimal ASCII codes.Text to codes · Codes to text ↗String Escape / UnescapeAdd or remove escape sequences in code strings.Escape · Unescape ↗

Time and schedule

Unix Timestamp ConverterConvert between Unix seconds, milliseconds, ISO 8601, and local time.Now · Timestamp → date · Date → timestamp ↗Cron Generator / ParserCreate or explain five-field Cron expressions in plain language.Generator · Parser ↗

Patterns and test data

Regex Tester and Common PatternsTest regular expressions and load ready-made Email, URL, and IP patterns.Test ↗Random Data GeneratorGenerate a JSON array of fake test records from a field list.Generate ↗

Reference

HTTP Status Code ReferenceThe full list of HTTP status codes with names, classes, and when to use each.Browse ↗MIME Type ReferenceA complete extension-to-MIME-type table grouped by file kind.Browse ↗chmod CalculatorView symbolic and octal file permissions side by side.Calculate ↗Color ConverterConvert a colour between HEX, RGB, and HSL.Convert ↗