Analyze UTF8
Analyze input UTF8 data and print byte sequence statistics. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Analyze UTF8
- 1. Paste the text you want inspected. Drop any string into the input pane, from a single emoji to a whole paragraph copied from a database dump. The tool re-encodes it as UTF8 the moment you stop typing.
- 2. Read the byte breakdown. The output lists total code points, total bytes, and how many characters fall into each sequence length (1, 2, 3 or 4 bytes), so you can see exactly how the string is stored.
- 3. Use the counts to explain a size or bug. Compare code point count against byte count to spot how much of your string is multi-byte, which is often the real reason a column truncated or a length check failed.
When to use Analyze UTF8
Analyze UTF8 is for the moment a string behaves differently than its character count suggests. Emoji, accented letters and CJK text all take more than one byte per character in UTF8, and this tool shows exactly how many bytes each character costs. Use it whenever a length limit, storage estimate or protocol spec talks about bytes rather than characters.
- Debugging a database column truncation. A VARCHAR(50) column silently cuts off a name with an accented letter because the database counts bytes, not characters. Running the string through this tool shows which characters cost 2 or 3 bytes and pushed it over the limit.
- Sizing a payload before a network limit. An SMS gateway or a Twitter-style API caps messages by byte count. Pasting your draft message here tells you the real byte total so you know if it fits before you send it.
- Explaining an emoji-heavy string in a bug report. A user pasted a message with several emoji and the app rejected it as too long. Feeding the same string in here shows that each emoji costs 4 bytes, which explains the mismatch to your teammates.
- Auditing a mixed-script log line. A log line mixes ASCII field names with Cyrillic or Japanese values. The 1-byte versus multi-byte sequence counts make it obvious how much of the line is non-ASCII at a glance.
Examples
Byte-sequence breakdown
Input
A€😀
Output
Total code points: 3 Total bytes: 8 1-byte sequences: 1 3-byte sequences: 1 4-byte sequences: 1
About the Analyze UTF8 tool
Analyze UTF8 is a free online tool that works entirely inside your web browser. Analyze input UTF8 data and print byte sequence statistics. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 69 UTF-8 utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
There is nothing to configure. Provide the input and the result appears on its own. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is Analyze UTF8 free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.