Validate Unicode

Need to make sure your text contains only valid Unicode characters? The Validate Unicode Tool scans every character and flags issues instantly. Whether you’re checking for malformed sequences, control characters, or surrogate pairs, this tool gives clear feedback on what’s valid and what’s not. Paste or import your content, tweak the settings, and get real-time results with highlights and code points.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total characters: 0
Options
Only show invalid
Show code points
Highlight issues

How to Use:

  1. Paste text into the input box or import a file.
  2. The output updates automatically to show which characters are valid.
  3. Use toggles to filter results or add extra info like code points.
  4. Export or copy the results when you’re done.

Tool Options:

  • Only show invalid: Filter the output to just bad characters.
  • Show code points: Display the Unicode number for each character.
  • Highlight issues: Add [INVALID] labels to problematic entries.

Example:

Input:

Hello πŸ˜ƒ \uD83D\uDE00 𐍈 δΈ­

Output:

H
e
l
l
o
πŸ˜ƒ
[INVALID] U+D83D ?
[INVALID] U+DE00 ?
𐍈
δΈ­

What Validate Unicode Tool can do:

It’s designed to help you detect broken sequences, invalid surrogates, and non-Unicode text in general. You can use it to audit files, clean datasets, or prepare content for encoding-safe applications.

Common Use Cases:

Developers and editors use the Validate Unicode Tool to verify text files, check emoji sequences, catch invisible errors in input fields, or debug corrupted logs. It’s quick, visual, and accurate.

Useful Tools & Suggestions:

When you’re checking character validity, Analyze Unicode is perfect for drilling into each symbol’s details. And if you’re working with raw input, Convert UTF32 to Unicode can help you cleanly bring that data into a readable format before validating anything.

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