JSON Formatter
Prettify raw JSON with consistent indentation.
json
plainutils.dev
Fast developer tools that work instantly.
Format, decode, generate, and inspect common developer data without leaving your browser.
JSON Tools
Format, validate, minify, and transform JSON payloads.
JSON Validator
Validate JSON and pinpoint parse errors quickly.
json
JSON Minifier
Strip whitespace from JSON for compact payloads.
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JSON to YAML
Convert JSON structures into YAML text.
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JSON to CSV
Turn arrays of objects into CSV for spreadsheets.
json
JSON to TypeScript
Generate TypeScript interfaces from JSON samples.
json
Encoding Tools
Encode and decode common web-safe text formats.
Base64 Encode
Encode plain text to Base64 instantly.
encoding
Base64 Decode
Decode Base64 strings into readable text.
encoding
URL Encode
Percent-encode URL components safely.
encoding
URL Decode
Decode percent-encoded URLs and query strings.
encoding
Security Utilities
Inspect and generate auth-related tokens safely in-browser.
JWT Decoder
Decode JWT header and payload without server calls.
security
JWT Generator
Generate unsigned JWT tokens for local testing.
security
Time and Date Tools
Convert timestamps, compute differences, and work with cron.
Timestamp Converter
Convert between Unix timestamps and date strings.
time
Date to Unix Timestamp
Turn an ISO date/time into Unix seconds and milliseconds.
time
Unix Timestamp to Date
Convert Unix seconds or milliseconds into readable dates.
time
Date Difference Calculator
Calculate the difference between two date/time values.
time
Cron Parser
Parse 5-field cron expressions into readable schedules.
time
Cron Generator
Generate common 5-field cron expressions quickly.
time
Text and Regex
Test, compare, transform, and generate text patterns.
Regex Tester
Test patterns and flags against live sample text.
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Regex Generator
Generate starter regex patterns for common input types.
text
Text Diff Checker
Compare two text blocks and highlight line-level differences.
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Slug Generator
Generate clean URL slugs from titles and phrases.
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Lorem Ipsum Generator
Generate placeholder paragraphs for layouts and components.
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Case Converter
Convert text between lower, upper, camel, snake, and kebab case.
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HTTP and API
Inspect HTTP details and build API request artifacts quickly.
HTTP Status Codes Reference
Quickly look up HTTP status meaning, causes, and debugging notes.
http
HTTP Header Checker
Inspect raw HTTP headers and identify missing security headers.
http
cURL Generator
Build cURL commands from method, URL, headers, and body.
http
API Request Builder
Create request config snippets for fetch-based API calls.
http
General Utilities
Common generation and hashing utilities for daily dev work.
UUID Generator
Generate RFC 4122 UUIDs in bulk instantly.
general
Hash Generator
Generate SHA hashes from input text in your browser.
general