Everything in the nest
All Tools
24 fast, free utilities that run entirely in your browser. Search by name, or narrow the list to a category — nothing is uploaded and nothing is installed.
24 tools
HTML Preview
Write and preview HTML in real time
JSON Formatter
Format, validate and beautify JSON
JSON Validator
Check whether JSON is valid
JSON Minifier
Shrink JSON to the smallest valid form
JSON Viewer
Explore JSON as a collapsible tree
JSON Compare
Diff two JSON documents by structure
JSON to CSV
Convert JSON records into a spreadsheet
CSV to JSON
Parse CSV into JSON, quoting and all
Word Counter
Count words, characters and more
CSS Minifier
Minify and optimize CSS code
JS Formatter
Format and beautify JavaScript
Base64 Encoder
Encode and decode Base64 strings
Regex Tester
Test and learn regular expressions
Markdown Preview
Write and preview Markdown
SVG Viewer
View and inspect SVG files
Case Converter
Convert text between camelCase, snake_case, UPPERCASE and more
Text Compare
Find differences between texts
JWT Decoder
Decode and inspect JWT tokens
Python Formatter
Format Python code instantly
C Code Formatter
Clean and format C code
Java Formatter
Format Java code with ease
Go Formatter
Format Go code instantly
Rust Code Viewer
Read, highlight and inspect Rust code
SQL Formatter
Format and beautify SQL queries
Make your development life a little easier.
ToolHive — useful tools you'll actually bookmark.