All tools
17 developer utilities. Format, convert, and validate — all in your browser.
- JSON FormatterJSON Tools · /json/json-formatter
Format and validate JSON with pretty-print and error reporting.
- JSON ValidatorJSON Tools · /json/json-validator
Validate JSON syntax and get clear error messages with line and column.
- JSON MinifierJSON Tools · /json/json-minifier
Minify JSON by removing whitespace to reduce file size.
- JSON to CSV ConverterJSON Tools · /json/json-to-csv
Convert JSON array of objects to CSV with configurable delimiter.
- CSV to JSON ConverterJSON Tools · /json/csv-to-json
Convert CSV to JSON array with headers as keys.
- Regex TesterRegex Tools · /regex/regex-tester
Test regular expressions in real time with match highlighting and replace preview.
- Regex for EmailRegex Tools · /regex/regex-email
Validate email addresses with a regex pattern and live tester.
- Regex for URLRegex Tools · /regex/regex-url
Match URLs with a regex pattern and test with examples.
- Regex for IPv4Regex Tools · /regex/regex-ipv4
Match IPv4 addresses with regex.
- Regex for Strong PasswordRegex Tools · /regex/regex-password-strong
Regex pattern to enforce strong password rules.
- Base64 Encode / DecodeEncoding Tools · /encoding/base64-encode-decode
Encode text to Base64 and decode Base64 to text. Handles Unicode safely.
- URL Encode / DecodeEncoding Tools · /encoding/url-encode-decode
Encode and decode URL percent-encoding. Handles spaces as + or %20.
- JWT DecoderEncoding Tools · /encoding/jwt-decoder
Decode JWT header and payload to inspect claims. No signature verification in V1.
- SHA256 HashEncoding Tools · /encoding/sha256-hash
Compute SHA-256 hash of text using Web Crypto API.
- Unix Timestamp ConverterTime Tools · /time/unix-timestamp-converter
Convert between Unix timestamps (seconds/milliseconds) and human-readable dates in local and UTC.
- ISO 8601 ↔ Epoch ConverterTime Tools · /time/iso8601-to-epoch
Convert between ISO 8601 datetime strings and Unix epoch (seconds or milliseconds). Both directions supported.
- Time Difference CalculatorTime Tools · /time/time-diff-calculator
Calculate the difference between two dates in days, hours, minutes, and seconds.