Developer Tools

176 tools

JSON, regex, hashing, encoding and other everyday developer utilities.

176 free tools
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All Developer Tools Tools

Showing 73–96 of 176

HTML Tag Stripper
Remove all HTML tags from a block of markup, leaving only the plain text content.

Free No signup

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HTTP Header Analyzer
Parse raw HTTP headers and identify common headers like Content-Type, Server, and Cache-Control.

Free No signup

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HTTP Status Code Lookup
Look up the meaning of any common HTTP status code, its category, and what it means for your request.

Free No signup

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HTTP/2 and HTTP/3 Protocol Compatibility Checker
Check whether a website supports HTTP/1.1, HTTP/2, and HTTP/3.

Free No signup

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IBAN Validator
Validate an International Bank Account Number (IBAN) via its ISO 7064 MOD-97 checksum.

Free No signup

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IMEI Mobile Device Number Validator
Validate a 15-digit IMEI number's Luhn checksum and break down its structure.

Free No signup

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IP Subnet Calculator
Calculate network address, broadcast address, subnet mask, and usable host range from an IPv4 CIDR.

Free No signup

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IPv6 Compressor / Expander
Compress an IPv6 address to its shortest form or expand it to its full form.

Free No signup

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IPv6 Subnet Calculator
Calculate the network range, host bits, and /64 breakdown of an IPv6 CIDR block.

Free No signup

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ISBN Validator
Validate an ISBN-10 or ISBN-13 book identifier via its official checksum.

Free No signup

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JavaScript Formatter
Beautify minified or messy JavaScript with indentation based on bracket depth.

Free No signup

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JavaScript Minifier
Strip comments and whitespace from JavaScript to reduce its size for production.

Free No signup

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JSON Formatter
Format, validate, minify and sort messy JSON — with clear error messages when it's invalid.

Free No signup

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JSON Minifier
Strip whitespace and formatting from JSON to reduce its size, while keeping it valid.

Free No signup

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JSON to CSV Converter
Convert a JSON array of objects into a CSV file, ready to open in a spreadsheet.

Free No signup

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JSON to XML Converter
Convert JSON data into formatted XML, with each key becoming an XML element.

Free No signup

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JWT Decoder
Decode a JSON Web Token's header and payload — client-side inspection only, no signature verification.

Free No signup

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JWT Generator
Generate a signed JSON Web Token (JWT) from a payload, secret, and algorithm.

Free No signup

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MAC Address Generator
Generate one or more random, locally-administered MAC addresses.

Free No signup

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Markdown Table Generator
Build a properly-aligned Markdown table from simple row input — ready to paste into a README or wiki.

Free No signup

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Markdown to HTML Converter
Convert Markdown to HTML — headers, bold/italic, links, lists, code blocks, blockquotes, and more.

Free No signup

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Meta Viewport Generator
Generate a mobile-responsive meta viewport tag with your chosen scaling settings.

Free No signup

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MIME Type Lookup
Look up the MIME type for a file extension, or the file extension(s) for a MIME type.

Free No signup

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Mirror Text (Horizontal Flip)
Flip text horizontally into a mirror image, using visually-mirrored Unicode lookalike characters where available.

Free No signup

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Frequently asked questions

The Developer Tools category currently has 176 tools — see the full list above.

Yes — every tool in this category is free, with no signup and no watermarks on generated documents.

Yes. As new tools are published in this area, they appear here automatically.