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River Chart
Tool Intro
River Chart is a free, install-free online theme river chart maker that uses flowing colored "rivers" to show how multi-dimensional data changes over time, with river width representing value and stacked rivers showing totals. No sign-up needed - edit data right in your browser, adjust river boundary, series labels, theme colors, legend, title and watermark. Everything is processed locally for privacy and security, and you can export high-resolution PNG/JPG/GIF images or WEBM/MP4/MOV animated videos in multiple formats.
How to Use
- Edit Data
Click the Edit/Upload Data button, fill in time, value and category (first column: time, second column: value, third column: category), or upload an Excel/CSV file for quick import.
- Adjust Style
Adjust boundary gap, series labels, theme colors, legend and axis as needed - the canvas previews changes in real time.
- Download Chart
Click the Download Chart button and choose an image or video format to export a high-definition chart.
Use Cases
- Time-series analysis: show how multiple dimensions increase or decrease over a period
- Event streams: visualize heat changes of events or topics along a timeline
- Share tracking: observe how each series' proportion of the total changes over time
- Animated demos: create animated theme river chart videos for presentations and teaching
Key Features
- Completely Free
Use all theme river chart features for free - a daily free quota covers everyday needs at zero cost.
- Privacy & Security
All data is processed locally in your browser and never uploaded to a server.
- Professional Results
Professional parameters like river boundary, series labels and multiple themes rival desktop software.
- All Platforms
No installation needed - works on desktop, tablet and mobile browsers anywhere, anytime.
- Multiple Formats
Export PNG/JPG/GIF images or WEBM/MP4/MOV videos for reports, printing and publishing.
Theme River Chart Guide
River width represents value size and overlapping rivers show totals - ideal for observing multi-dimensional data over time.
| Element | Description | Suggestion |
|---|---|---|
| River Width | The thickness of a river reflects its value | Rivers get thin with too many series; trim the series |
| Boundary Gap | Controls the gap between rivers | Reduce the gap when there are many series |
| Series Labels | Show series names on the rivers | Adjust label margins to avoid overlap with many series |
| Time Axis | Shows chronological order on the horizontal axis | Rotate axis labels when there are many time points |
FAQ
A theme river chart uses flowing river shapes to show how multi-dimensional data changes over time: river thickness reflects value size and stacked rivers reveal totals.
Click Edit/Upload Data to fill in or import data (first column: time, second column: value, third column: category), adjust river boundary and series label parameters with real-time preview, then click Download Chart to export.
You can edit data directly in the table, or upload Excel (.xlsx/.xls) and CSV files. The data is three columns: time, value and category.
Data is processed locally in your browser, so there is no strict size limit for most cases; for very large datasets, simplify the data to keep previews smooth.
The theme river chart renders in real time in your browser - with moderate data volumes you get instant previews and see every parameter change immediately.
No. All data processing happens locally in your browser and nothing is uploaded, so your privacy is fully protected.
The tool offers a daily free quota that covers light everyday use at zero cost; upgrade to membership for higher limits or heavier use.
Yes. It is a web-based tool with no installation required - it works and exports charts normally in browsers on phones, tablets and computers.
A stacked area chart usually anchors totals at the top; a theme river chart flows around a central baseline, so river thickness reflects each series' relative value more intuitively and looks lighter visually.
Check the data format: first column must be time, second column values, third column categories, and values must be numbers; verify the header row, or click Export Data to inspect the current table format.
Export high-resolution images at 2x or even 4x pixel ratio, and videos at HD quality by default - suitable for reports, printing and publishing.
Fine-tune boundary gap and series labels for readability, use multiple themes for different occasions, or export animated videos to show change over time dynamically.
Content last updated：2026-07-10
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