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Free Tools
28 free online tools for building and shipping websites
Formatters, validators, converters and generators for HTML, CSS, JavaScript, JSON, XML and the files search engines read. Every one runs free in your browser with no signup, and when the file is ready you can publish it as a live website on Static.app.
HTML, CSS and JavaScript
Format, minify, validate and preview front-end code.
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HTML Formatter
Beautify, indent and pretty-print messy or minified HTML into readable markup.
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HTML Minifier
Strip whitespace and comments to cut file size and speed up load times.
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HTML Viewer
Paste or upload HTML and watch it render live in a preview pane beside the code.
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HTML Tester
Test, debug and refine HTML in the browser with nothing to install.
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HTML Validator
Check your markup against current web standards and find the errors.
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HTML Encoder
Turn raw markup into HTML-encoded text so it displays instead of rendering.
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HTML Decoder
Convert encoded HTML entities back into plain, readable text.
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CSS Formatter
Organize and clean up stylesheets for readability and easier maintenance.
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CSS Minifier
Shrink CSS to the smallest valid form for faster page loads.
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JS Formatter
Re-indent and tidy JavaScript so it is readable again.
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JS Minifier
Compress JavaScript to reduce file size and improve performance.
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HTML to Markdown
Paste HTML and get clean, readable Markdown back.
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Markdown to HTML
Paste Markdown and get ready-to-use HTML in seconds.
JSON and XML
Read, check and convert structured data.
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JSON Beautifier
Format and pretty-print messy or minified JSON right in your browser.
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JSON Validator
Find syntax errors and get the exact line and column where JSON breaks.
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JSON Minifier
Compress JSON to one compact line with every value preserved exactly.
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XML Viewer
Pretty-print XML with clean indentation and check that it is well-formed.
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XML to JSON
Convert XML documents into JSON, including nested elements and attributes.
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JSON to XML
Turn JSON into valid XML for systems that still expect it.
SEO and site files
Generate and check the files search engines read.
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Meta Tag Generator
Build SEO, Open Graph and Twitter Card tags with live Google and social previews.
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Open Graph Checker
See the og: and twitter: tags a URL really serves, and preview the card.
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Favicon Generator
Turn one image into favicon.ico, every PNG size, apple-touch-icon and a manifest.
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Redirect Generator
Bulk 301 rules for .htaccess, Nginx, Netlify, Vercel and IIS web.config.
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Robots.txt Generator
Pick a preset, block AI crawlers like GPTBot, and get a valid robots.txt.
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Sitemap Generator
Paste your URLs and get a valid sitemap.xml ready for Search Console.
Domains and networking
Inspect what a domain or a URL is actually serving.
Finished the file? Publish it as a real website
Select File
or drop your archive to upload
Frequently asked questions
Are these tools really free?
Yes. Every tool on this page is free to use with no signup, no account, and no usage limit. They are here because they pair naturally with static website hosting, which is the paid product. You can use the tools without ever hosting anything with us.
Do I need to install anything?
No. Every tool runs in the browser you are reading this in. There is nothing to download and no extension to add. Most of them do their work locally on your device, so your file is not uploaded just to be formatted or converted.
Is my code or data uploaded to your servers?
For most of the tools, no: the formatting, minifying, and converting happens in your browser and the file never leaves your device. A few tools have to reach the network to do their job at all, such as DNS Lookup, SSL Checker, and Open Graph Checker, because each one has to go and ask a remote server a question. Each tool page states what it does with your input.
Can I publish the file after using a tool?
Yes, and that is the connection between the tools and the rest of Static.app. Once your file is ready, put it in a ZIP and upload it to get a live website on a free static.domains subdomain with SSL, or on your own custom domain. The uploader takes a ZIP rather than a bare file, and the free tier is a 7-day trial.
Which tool should I use to check my code for errors?
Use HTML Validator for markup that should follow web standards, JSON Validator for JSON that has to parse, and XML Viewer to confirm an XML document is well-formed. If you want to see how a page actually renders rather than whether it is valid, use HTML Viewer or HTML Tester instead.