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Validate, format, minify, and inspect JSON with a readable tree view in one place.
Test regex patterns, inspect capture groups, generate suggested patterns, and explain regex token-by-token in plain language.
Encode plain text to Base64 or decode Base64 to text.
Generate UUID v1, v4, and v7 values or inspect existing UUIDs to identify version, variant, and canonical format.
Decode JWTs, inspect claims, interpret token timing, and verify HS256/HS384/HS512 signatures.
Write markdown with live preview, GitHub-style formatting, code highlighting, TOC, and export actions.
Encode or decode URL components with safe error handling.
Parse URL query strings into readable key-value JSON.
Convert Unix timestamps to human-readable dates and back.
Convert date-time values between IANA timezones.
Format JavaScript code with readable spacing and line breaks.
Beautify HTML markup with indentation and line breaks.
Format CSS rules with consistent spacing and indentation.
Format SQL queries into readable multi-line statements.
Generate secure random passwords with customizable options.
Generate SHA-256 hashes in your browser.
Compare two text blocks with Git-style unified and split diff views, including inline change highlights.
Minify JSON safely by parsing first, then removing whitespace without changing data structure.
Convert valid JSON into readable YAML for config files, documentation, and DevOps workflows.
Parse YAML and convert it to formatted JSON for API payloads, scripts, and application data models.
Generate TypeScript interfaces and types from JSON input for faster model scaffolding.
Convert text into clean URL-friendly slugs for routes, posts, and identifiers.
Normalize repeated spaces and tabs while preserving line breaks by default.
Convert text into upper, lower, title, camel, snake, and kebab case.
Calculate precise time differences between two date-time values.
Add or subtract time durations and date-time values.
Calculate subnet details from CIDR notation.
Check website reachability with HTTP status, response time, content length, and server header.
Fetch a URL server-side and inspect HTTP status plus response headers in table format.
Query DNS records including A, AAAA, CNAME, MX, TXT, and NS for a domain.
Follow HTTP redirects server-side and inspect each hop in the redirect chain.
Convert JSON to XML with configurable root element and readable pretty-printed output.
Parse common 5-part cron expressions into readable schedules.
Resolve a domain to IPv4/IPv6 addresses and optional reverse hostnames.
Lookup public IP geolocation and network metadata such as ASN and ISP.
Inspect SSL certificate issuer, subject, validity dates, and expiration window for a domain.
Remove duplicate lines while preserving original order.
Convert HEX color values into RGB format with live preview.
Convert RGB values into HEX color strings with visual swatch preview.
Parse full URLs into protocol, host, path, query, and hash components.
Parse user-agent strings to identify likely browser, OS, device type, and engine.
Build full URLs from base path, query parameters, and hash fragments.
Convert ISO date strings into readable local/UTC forms and back.
Generate Unix timestamps (seconds and milliseconds) from date-time input.
Convert text into binary byte representation for debugging and learning.
Convert binary byte groups into text with validation and error handling.
Convert text into hexadecimal byte output for debugging and encoding workflows.
Convert hexadecimal byte strings back to text with input validation.
Convert text characters into ASCII code points and inspect byte mappings.
Generate QR codes and common barcode formats in-browser with live preview, presets, and downloads.
Check sitemap.xml availability, detect sitemap index files, and list discovered URLs.
Fetch robots.txt, view raw directives, and extract sitemap references for diagnostics.
Create linear and radial CSS gradients with live preview and copy-ready output.
Generate CSS box-shadow values with interactive controls and live preview.
Build border-radius CSS for uniform or per-corner rounded shapes with live preview.
Parse raw HTTP header text into structured key-value JSON output.
Generate cron expressions from common schedule options like daily, weekly, and monthly.
Render Handlebars templates with JSON data and preparation scripts for custom helpers in-browser.
Render Mermaid syntax into visual diagrams directly in your browser with clear error feedback.
Connect to WebSocket endpoints, send messages, and inspect realtime responses with chronological logs.
Generate starter regex patterns for common validation use cases.
Test simple JSON path expressions against JSON input and inspect matched values.
Generate demo JWT structures from header and payload JSON with transparent signing limitations.
Examples, Regex examples, Converter hub, Learn guides.