Draw a Unicode Sparkline
Generate graphs using Unicode symbols. 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 Draw a Unicode Sparkline
- 1. Paste the numbers to chart. Paste a series of numbers separated by spaces or commas, such as daily counts or measurements you want visualized as a tiny inline chart.
- 2. See values mapped to block heights. Each number is scaled relative to the smallest and largest values in the series and mapped to one of eight block-height Unicode characters, forming a compact bar chart in a single line.
- 3. Copy the sparkline. Copy the sparkline and paste it into a terminal log, a commit message, or a chat message where a full chart would be overkill but a shape at a glance helps.
When to use Draw a Unicode Sparkline
Draw a Unicode Sparkline turns a short series of numbers into a single line of block characters that rises and falls with the data. It is for anywhere a tiny inline trend shape is more useful than a full chart, since it fits inside plain text.
- Summarizing a week of metrics in a Slack message. You want to show a colleague how daily signups trended over the past week without pasting a screenshot, so you convert the seven daily numbers into a sparkline right in the chat message.
- Annotating a log line with a trend shape. A monitoring script logs a numeric value every minute, and appending a sparkline of the last ten readings to each log entry gives an at-a-glance sense of the recent trend.
- Adding a mini chart to a commit message or changelog. A performance-related commit improved response times across several test runs, and a sparkline in the commit message shows the before-and-after shape without attaching an image.
- Visualizing data in a terminal-only environment. You are working over SSH with no way to render an image, and a sparkline lets you see the shape of a dataset directly in the terminal output.
Examples
Sparkline
Input
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Output
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About the Draw a Unicode Sparkline tool
Draw a Unicode Sparkline runs as plain JavaScript in your browser tab, with no server behind it. Generate graphs using Unicode symbols. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Unicode Tools section, 98 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
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.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Draw a Unicode Sparkline 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.