Developer Tools
This category collects practical browser-based tools for common development tasks such as validation, parsing, encoding, decoding, formatting, and quick data transformation.
These tools are designed for small repeat workflows that come up during coding, debugging, testing, documentation, and API work. Instead of opening a full local environment for every minor check, you can use focused pages to inspect or transform one value quickly.
What these tools are useful for
Validation and debugging
Use developer tools to check whether input is valid, inspect encoded data, test patterns, or confirm that structured content is in the expected format.
Formatting and transformation
Many development tasks involve converting one format into another, cleaning structured data, or generating output that is easier to read and compare.
Quick workflow helpers
These pages are useful for routine tasks such as checking hashes, decoding tokens, working with JSON or text formats, and solving small technical problems without extra setup.
Browse developer tools
Search the available tools below if you already know the type of technical task you need to handle.
Regex Tester
Test regular expressions with live pattern matching, flags, validation, result cards, and FAQ schema.
OpenRegex Generator
Generate common regex patterns for numbers, words, email, URL, date, and custom constraints with validation, result cards, and FAQ schema.
OpenJSON Validator
Validate JSON, pretty-print or minify it, inspect top-level type, and review errors with result cards and FAQ schema.
OpenJSON to CSV
Convert JSON arrays of objects to CSV with validation, delimiter options, result cards, and FAQ schema.
OpenCSV to JSON
Convert CSV to JSON with delimiter controls, header options, validation, result cards, and FAQ schema.
OpenJWT Decoder
Decode JWT header and payload locally, inspect claims, expiration values, and structure with result cards and FAQ schema.
OpenJWT Encoder
Encode JWT header and payload locally into a token-like string for testing and development. Includes validation, result cards, and FAQ schema.
OpenHash Generator
Generate hashes for text using SHA-1, SHA-256, SHA-384, and SHA-512 with encoding options, validation, and FAQ schema.
OpenMD5 Generator
Generate MD5 hashes for text input with validation, result cards, copy support, and FAQ schema.
OpenSHA256 Generator
Generate SHA-256 hashes for text input with validation, copy support, result cards, and FAQ schema.
OpenBcrypt Generator
Generate bcrypt hashes for text input with configurable cost, validation, copy support, and FAQ schema.
OpenURL Parser
Parse URLs into protocol, host, path, query, hash, and parameters with validation, result cards, and FAQ schema.
OpenHTTP Header Parser
Parse raw HTTP headers into name/value pairs with validation, duplicate detection, result cards, and FAQ schema.
OpenUser Agent Parser
Parse user agent strings into browser, engine, OS, device hints, and platform details with result cards and FAQ schema.
OpenCron Expression Generator
Generate 5-field cron expressions for common schedules with validation, human-readable summaries, and FAQ schema.
OpenCron Expression Parser
Parse 5-field cron expressions into readable schedules with validation, field inspection, and FAQ schema.
OpenUUID Validator
Validate UUID strings, inspect version and variant, and review normalized output with result cards and FAQ schema.
OpenHreflang Generator
Generate hreflang link tags for multilingual and multi-region pages with validation, result cards, and FAQ schema.
OpenMeta Tag Generator
Generate HTML meta tags for SEO, Open Graph, Twitter Cards, robots, and canonical URLs with validation, result cards, and FAQ schema.
OpenMeta Tag Analyzer
Analyze HTML head markup for title, meta description, canonical, robots, Open Graph, and Twitter tags with validation, result cards, and FAQ schema.
Openrobots.txt Generator
Generate robots.txt rules with user-agent, allow, disallow, sitemap, and crawl-delay fields using validation, result cards, and FAQ schema.
OpenSitemap Generator
Generate XML sitemap entries from a base URL and path list, with validation, result cards, and FAQ schema.
OpenTitle Length Checker
Check title tag length, preview common SEO guidance ranges, and review word count with validation, result cards, and FAQ schema.
OpenDescription Length Checker
Check meta description length, word count, and common SEO guidance with validation, result cards, and FAQ schema.
OpenHeading Structure Checker
Analyze HTML heading structure (H1-H6), count heading usage, and detect skipped levels with validation, result cards, and FAQ schema.
OpenSlug Generator
Generate clean URL slugs from text with lowercase, separator, and cleanup options using validation, result cards, and FAQ schema.
OpenCanonical Tag Generator
Generate rel=canonical link tags from a URL with validation, result cards, and FAQ schema.
OpenRedirect Checker
Inspect redirect chains from pasted URL sequences, compare hops, and review redirect status manually with validation, result cards, and FAQ schema.
OpenSchema Markup Generator
Generate JSON-LD schema markup for common page types with validation, result cards, and FAQ schema.
OpenSchema Validator
Validate JSON-LD schema syntax, inspect core properties, and review result cards and FAQ schema.
OpenHash Comparator
Compare two hash strings, inspect likely algorithms, and review result cards with FAQ schema.
OpenBcrypt Checker
Check bcrypt hash format, version, cost factor, and structure with result cards and FAQ schema.
OpenJWT Validator
Validate JWT structure, decode header and payload, inspect standard claims, and review result cards with FAQ schema.
OpenBase32 Encoder
Encode text to Base32 (RFC 4648) with UTF-8 support, validation, result cards, and FAQ schema.
OpenBase32 Decoder
Decode Base32 (RFC 4648) to UTF-8 text with validation, result cards, and FAQ schema.
OpenBase58 Encoder
Encode UTF-8 text to Base58 using the Bitcoin alphabet, with validation, result cards, and FAQ schema.
OpenBase58 Decoder
Decode Base58 using the Bitcoin alphabet back to UTF-8 text, with validation, result cards, and FAQ schema.
OpenBase85 Encoder
Encode UTF-8 text to Ascii85/Base85 with validation, result cards, and FAQ schema.
OpenBase85 Decoder
Decode Ascii85/Base85 back to UTF-8 text with validation, result cards, and FAQ schema.
OpenBinary to Text
Convert binary to UTF-8 text with validation, grouping cleanup, result cards, and FAQ schema.
OpenText to Binary
Convert UTF-8 text to binary bytes with grouping options, result cards, and FAQ schema.
OpenData URI Generator
Generate data: URIs from text using percent-encoding or Base64, with validation, result cards, and FAQ schema.
OpenData URI Decoder
Decode data: URIs, inspect media type and encoding, and extract UTF-8 text content with result cards and FAQ schema.
OpenYAML to JSON
Convert YAML to JSON with validation, pretty-printing, result cards, and FAQ schema.
OpenJSON to YAML
Convert JSON to YAML with validation, formatted output, result cards, and FAQ schema.
OpenHTML Entity Encoder
Encode text into HTML entities with validation, result cards, output options, and FAQ schema.
OpenHTML Entity Decoder
Decode HTML entities into readable text with validation, result cards, output metrics, and FAQ schema.
OpenUnicode Escape
Convert text into Unicode escape sequences with validation, options, result cards, and FAQ schema.
OpenUnicode Unescape
Convert Unicode escape sequences back into readable text with validation, result cards, and FAQ schema.
OpenString Escape
Escape text for JavaScript-style string literals with validation, options, result cards, and FAQ schema.
OpenString Unescape
Convert escaped string sequences back into readable text with validation, result cards, and FAQ schema.
OpenXML Formatter
Format and validate XML with indentation, result cards, metrics, and FAQ schema.
OpenXML Minifier
Minify and validate XML by removing unnecessary whitespace with result cards, metrics, and FAQ schema.
OpenJSON Minifier
Minify valid JSON into compact output with validation, result cards, metrics, and FAQ schema.
OpenCSV Formatter
Validate and normalize CSV with consistent quoting, line endings, result cards, and FAQ schema.
OpenTSV to CSV
Convert TSV to CSV with validation, quoting, result cards, and FAQ schema.
OpenCSV to TSV
Convert CSV to TSV with parsing, validation, result cards, metrics, and FAQ schema.
OpenIP Validator
Validate IPv4 addresses with format checks, private/public range hints, result cards, and FAQ schema.
OpenIPv4 to Decimal
Convert IPv4 addresses to 32-bit decimal integers with validation, binary output, result cards, and FAQ schema.
OpenDecimal to IPv4
Convert unsigned 32-bit decimal values to IPv4 addresses with validation, octet breakdown, result cards, and FAQ schema.
OpenCIDR Calculator
Calculate subnet mask, network address, broadcast address, and usable host range from IPv4 CIDR notation.
OpenSubnet Calculator
Calculate IPv4 subnet details from an IP address and subnet mask, including network, broadcast, wildcard, prefix, and usable host range.
OpenIP Range Calculator
Calculate the number of IPv4 addresses between two endpoints, validate order, and inspect range details with FAQ schema.
OpenAPI Key Generator
Generate secure API keys with customizable length, prefixes, separators, and character sets. Includes result cards and FAQ schema.
OpenRandom Token Generator
Generate secure random tokens in hex, base64url, or alphanumeric format with configurable length and count.
OpenSalt Generator
Generate cryptographically secure salts in hex or base64url with configurable byte length and count.
OpenNonce Generator
Generate secure nonces in hex or base64url format with configurable byte length and count. Includes result cards and FAQ schema.
OpenIPv6 Compressor
Compress an expanded IPv6 address into canonical shorter form with validation, result cards, and FAQ schema.
OpenIPv6 Expander
Expand IPv6 addresses to full 8-group notation with validation, result cards, and FAQ schema.
OpenMAC Address Generator
Generate random MAC addresses with separator, case, and local-admin options. Includes validation, result cards, and FAQ schema.
OpenMAC Address Validator
Validate MAC addresses, normalize format, inspect bits, and review result cards with FAQ schema.
OpenMIME Type Checker
Check likely MIME type from filename or uploaded file metadata, with validation, result cards, and FAQ schema.
OpenHow to choose the right tool
If your task is about checking whether data is correct, start with a validator or parser. If your task is about changing one representation into another, choose an encoder, decoder, formatter, or converter. If you need a quick test during implementation or debugging, use the page that matches the exact data type you are currently handling.
Keeping each tool focused on one technical job makes the result easier to understand and reduces the noise that often appears in large all-in-one developer dashboards.
Why these tools are grouped separately
Developer tools solve a different kind of problem from general calculators or consumer utilities. They are usually used while building, testing, inspecting, or debugging technical content such as JSON, tokens, encoded strings, regular expressions, structured text, or configuration values.
Grouping them in one category makes browsing easier for developers, technical writers, testers, and API users who need focused helpers for small but frequent workflow tasks.