JSON Formatter
format JSON with readable indentation
Developer
Developer and Data Tools
Format, validate, and transform developer data directly in your browser.
Client-side tools for JSON/XML/CSV transformations, encoding, hashing, timestamp conversion, and quick code cleanup.
Tools in this category
JSON Validator
validate JSON syntax and detect parse errors
JSON Diff Tool
compare two JSON payloads and identify differences
XML Formatter
format XML text with line indentation
XML to JSON Converter
convert simple XML node content into JSON output
CSV to JSON Converter
convert CSV rows into JSON objects
Base64 Encoder Decoder
encode or decode Base64 text
URL Encoder Decoder
encode or decode URL-safe strings
Regex Tester
test regex patterns against sample text
Timestamp Converter
convert Unix timestamps and ISO date-time values
UUID Generator
generate UUID-style identifiers
Hash Generator
generate quick non-cryptographic hashes for text comparison
Text Diff Checker
compare two text blocks line by line
HTML Entity Encoder Decoder
encode or decode HTML entities
JWT Decoder
decode JWT payload safely without verification
Minify JSON
remove whitespace from JSON payloads
Minify CSS
minify CSS by trimming whitespace and comments
Minify HTML
minify HTML by collapsing unnecessary spacing
Code Formatter Basic
apply basic indentation formatting for code snippets
Color Code Converter
convert color values between HEX, RGB, and HSL
Popular Related Tools
Category FAQ
How should I use the developer and data tools tools?
Start with one calculator, review the assumptions shown on the page, then compare with related tools for scenario planning.
Are these tools free to use?
Yes. Online Tools and Calculators is free and designed for practical educational and planning use.
Can I use these tools on mobile?
Yes. The pages are built mobile-first with large fields, clear labels, and keyboard-friendly controls.