Free Developer Tools and Utilities
Free browser-based tools for developers, designers, and anyone who works with code or data. All of them run locally, so nothing is uploaded to any server and whatever you paste stays on your machine. That matters more than it sounds when the thing you're formatting contains an API key. No account, no usage cap, and no tool held back behind a signup.
Quick Answer
IWantFreeTools offers browser-based utilities across four groups: code tools like the JSON formatter, code formatter, CSS minifier and regex tester; text tools like the word counter, lorem ipsum generator, markdown editor and text diff; colour conversion; and encoders including Base64, URL encoding, hashing and slugs. Everything runs locally with no account.
Code Tools
Format it, validate it, or squeeze it back down for production.
Code Formatter
Beautify or minify JSON, CSS, HTML, JavaScript, SQL and Markdown in one place.
🔒 Runs locally Use Free ToolJSON Formatter
Beautify, minify and validate JSON, with the error position when it will not parse.
🔒 Runs locally Use Free ToolCSS Minifier
Strip comments and whitespace from a stylesheet so it downloads faster.
🔒 Runs locally Use Free ToolHTML Encoder
Escape angle brackets and entities so markup can be displayed rather than rendered.
🔒 Runs locally Use Free ToolRegex Tester
Test a regular expression against sample text with live match highlighting.
🔒 Runs locally Use Free ToolJSON to CSV
Turn an array of JSON objects into a spreadsheet-friendly CSV file.
🔒 Runs locally Use Free ToolText and Content
Count it, compare it, clean it up, or fill a layout before the real copy exists.
Word Counter
Live word, character, sentence and paragraph counts as you type or paste.
🔒 Runs locally Use Free ToolLorem Ipsum Generator
Placeholder text by paragraph, sentence or word count for mocking up a layout.
🔒 Runs locally Use Free ToolMarkdown Editor
Write Markdown with a live preview beside it, then copy the rendered result.
🔒 Runs locally Use Free ToolText Diff
Compare two blocks of text and see exactly what changed between them.
🔒 Runs locally Use Free ToolCase Converter
Switch text between upper, lower, title, sentence, camel and snake case.
🔒 Runs locally Use Free ToolRemove Duplicate Lines
Strip repeated lines from a list, with the original order preserved.
🔒 Runs locally Use Free ToolColor and Design
Colour values that behave. The picker and gradient builder live on our sister site rather than being duplicated here.
Color Converter
Move a colour between hex, RGB and HSL without doing the arithmetic yourself.
🔒 Runs locally Use Free ToolRandom Color Generator
Generate a random colour with its hex, RGB and HSL values ready to copy.
🔒 Runs locally Use Free ToolColor Picker
Pick a colour visually or lift one from an image. Lives on IWantFreeColorTools.
↗ Sister site Use Free ToolGradient Generator
Build a CSS gradient and copy the rule. Lives on IWantFreeColorTools.
↗ Sister site Use Free ToolEncode and Convert
Move data between systems that disagree about which characters are allowed.
Base64 Encoder
Encode and decode Base64. Useful for data URLs, not useful for hiding anything.
🔒 Runs locally Use Free ToolURL Encoder
Escape characters that would otherwise break a query string or a link.
🔒 Runs locally Use Free ToolHash Generator
Produce a checksum from text to verify that two copies really are identical.
🔒 Runs locally Use Free ToolSlug Generator
Turn a title into a clean URL slug with accents and punctuation handled.
🔒 Runs locally Use Free ToolUUID Generator
Generate unique identifiers one at a time or in bulk, ready to paste.
🔒 Runs locally Use Free ToolUTM Builder
Assemble a campaign tracking URL without mistyping a parameter name.
🔒 Runs locally Use Free ToolQuizzes
Not sure which of these you need? Answer eight questions instead of reading every page.
Developer Tool Finder Quiz
Eight questions that narrow twenty tools down to the three that fit your task.
🔒 Runs locally Take the QuizQuestions people ask about these tools
Are these developer tools really free?
Yes. Every tool here is free with no account, no trial period, and no usage cap. The site is funded by ads rather than by charging for the tools. There is no paid tier holding features back, so what loads on each page is the whole thing. Where a tool cannot do something, the page says so rather than putting it behind a signup.
Does my data get uploaded to a server?
No. Every tool on this site runs in your browser using JavaScript, so whatever you paste stays in memory on your own device. That matters most for the encoders and formatters, since those are the ones people paste API keys and customer data into. Load a tool, disconnect from the internet, and it still works, which is the proof rather than the promise.
Which developer tool should you use?
Start from the task rather than the category. Formatting code, encoding data, converting colours, and generating placeholder text have nothing in common beyond living on the same site. If you are not sure which one fits, the tool finder quiz asks eight questions and points you at a shortlist rather than making you read every page.
Do you need to be a developer to use these?
No, and most of the traffic here is not developers. Word counters, case converters, colour converters, and lorem ipsum generators get used mainly by writers, designers, and marketers. The two tools that genuinely assume technical background are the regex tester and the hash generator. Everything else needs no setup and no command line.
Is Base64 a way to protect data?
No, and this is worth being clear about. Base64 is an encoding that represents binary data in characters safe for text transport, which is why it appears in data URLs and email attachments. It is trivially reversible with no key. A Base64 string in a config file is effectively plain text, so it should never be used to hide a credential.
Sources: The behaviour of the formats these tools operate on, including Base64 encoding, colour notation, and how whitespace is treated in HTML and CSS, is documented by MDN Web Docs, maintained by Mozilla with contributions from Google and Microsoft. The underlying specifications, including which whitespace is significant in CSS, are published by the W3C, the standards body for the web platform.
Last updated: 2026-07-28