HTML Formatter and Minifier
Featured
Format or minify HTML markup on your device.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
Related tools
HTML Encoder and Decoder
Featured
Encode or decode HTML entities.
- On your device
- No signup
JSON Formatter
Featured
Format, minify, and validate JSON with optional key sorting.
- On your device
- No signup
JSON Compare
Featured
Compare two JSON documents and list structural differences.
- On your device
- No signup
XML Formatter
Featured
Format, minify, and validate XML with readable indentation.
- On your device
- No signup
XML Compare
Featured
Compare two XML documents and list structural differences.
- On your device
- No signup
Base64 Encoder & Decoder
Featured
Encode and decode text with Base64.
- On your device
- No signup
JWT Decoder
Featured
Decode JWT header, payload, and expiry—including Bearer tokens—on your device.
- On your device
- No signup
Write Markdown on the left to see a live HTML preview on the right. Rendering uses GitHub-flavored Markdown on your device.
How to use this tool
1. Paste or type input into the Markdown Previewer editor. 2. Adjust format, mode, or option controls if shown. 3. Review live output or validation messages from Markdown Previewer. 4. Fix any reported errors. 5. Copy the result when it looks correct. Processing runs on your device; inputs are not uploaded to our server.
Worked example
Example: paste a small sample input into Markdown Previewer, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
How it works
Write Markdown on the left to see a live HTML preview on the right. Rendering uses GitHub-flavored Markdown on your device.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data stays on your device and is not uploaded.
FAQ
Frequently asked questions
Which Markdown flavor is used?
GitHub-flavored Markdown with line breaks enabled.
Is my Markdown stored?
No. Everything stays on your device.
Is Markdown Previewer free to use?
Yes. Utilnivo tools are free to use and do not require an account.
Related pages
- Formatters — compare developer tools and read FAQs
- Browse all free online tools on Utilnivo
- Explore more developer tools on Utilnivo
- HTML Formatter and Minifier — Format or minify HTML markup on your device.
- HTML Encoder and Decoder — Encode or decode HTML entities.
- JSON Formatter — Format, minify, and validate JSON with optional key sorting.
- JSON Compare — Compare two JSON documents and list structural differences.
- XML Formatter — Format, minify, and validate XML with readable indentation.
Page last reviewed: