# Line Graph Maker — Full Context

> Free online line graph maker with 27+ chart templates. Create, customize, and export professional line charts from CSV or Excel data in seconds. No signup required.

Line Graph Maker is a browser-based data visualization tool built with Next.js. Users paste CSV/Excel data (or upload files), choose from 27+ chart types, customize every visual detail, and export publication-ready PNG/SVG images — all without creating an account or installing software.

The tool supports five languages (English, Spanish, Portuguese, Chinese Simplified, Chinese Traditional) and is completely free to use.

## Core Pages

- [Line Graph Maker — Home](https://www.line-graph-maker.com): The main chart creation tool. Paste or upload data, select a chart type, customize colors/labels/annotations, and export.
- [Chart Types Gallery](https://www.line-graph-maker.com/resources/line-charts): Browse all 27+ line chart types organized by category, each with interactive preview, sample data, and one-click "try it" link.
- [Templates Library](https://www.line-graph-maker.com/templates): Industry-specific chart templates with pre-loaded sample data and optimized configurations.
- [Free Tools](https://www.line-graph-maker.com/tools): Data conversion, visualization, and calculation tools — all free, browser-based.
- [Bar Chart Maker](https://www.line-graph-maker.com/tools/bar-chart-maker): Create customizable bar charts from CSV in the browser. Supports vertical/horizontal layouts, stacked bars, and direct PNG/SVG export.
- [Pie Chart Maker](https://www.line-graph-maker.com/tools/pie-chart-maker): Create pie or donut charts from CSV data with selectable value series, rose mode, and one-click PNG/SVG export.
- [Scatter Plot Maker](https://www.line-graph-maker.com/tools/scatter-plot-maker): Create scatter plots from CSV with built-in OLS linear regression trend line. Shows slope, intercept, and R² in real time. Supports per-group fitting when data has a grouping column.
- [Area Chart Maker](https://www.line-graph-maker.com/tools/area-chart-maker): Create area charts from CSV in the browser. Supports stacked vs overlapping modes, smooth curves, three fill-opacity levels, and direct PNG/SVG export.
- [CSV to JSON Converter](https://www.line-graph-maker.com/tools/csv-to-json): Convert CSV data to JSON format instantly. Supports comma, tab, semicolon, and pipe delimiters. Three output formats: Array of Objects, Array of Arrays, Column Arrays. File upload, drag-and-drop, and bidirectional conversion (JSON to CSV).
- [JSON to CSV Converter](https://www.line-graph-maker.com/tools/json-to-csv): Convert JSON arrays into CSV instantly. Supports array-of-objects and array-of-arrays input, delimiter selection, and browser-side processing with copy/download output.
- [Blog](https://www.line-graph-maker.com/blogs): Tutorials on data visualization, chart design best practices, and how-to guides.
- [Explore Datasets](https://www.line-graph-maker.com/explore): Curated public datasets with instant chart previews.

## Chart Types by Category

### Fundamentals

Essential line chart patterns including basic, smoothed, and step lines. Learn styling primitives for communicating trends clearly in any data visualization project.

- [Basic Line](https://www.line-graph-maker.com/resources/line-charts/basic-line): A standard single or multi-series line chart showing trends over an ordered domain. Includes interactive example, sample CSV data, and free PNG/SVG export in our online maker.
- [Smoothed Line](https://www.line-graph-maker.com/resources/line-charts/smoothed-line): Curved spline lines emphasize overall tendencies while smoothing out noise. Ideal for presentations where visual clarity matters more than pinpoint accuracy. Try it free online.
- [Step Line](https://www.line-graph-maker.com/resources/line-charts/step-line): Stair-step transitions highlight discrete changes and hold periods in your data. Perfect for pricing tiers, status changes, and categorical shifts over time. Free online tool.
- [Multiple Series Line Chart](https://www.line-graph-maker.com/resources/line-charts/multiple-series-line): Compare several lines on shared axes to see which series leads, lags, or diverges over time. Ideal for regions, products, or cohorts that share one unit and scale. Interactive example and sample CSV included.
- [Slope Chart](https://www.line-graph-maker.com/resources/line-charts/slope-chart): A two-point line chart that connects "before" and "after" values so the rank and direction of change are instantly readable. Perfect for comparing many items across exactly two periods. Free interactive example and CSV.

### Area & Stacked

Area fills, stacking strategies, gradient compositions, and confidence bands. Visualize part-to-whole relationships and cumulative trends with interactive examples.

- [Basic Area](https://www.line-graph-maker.com/resources/line-charts/basic-area): Fill under a line to emphasize accumulated magnitude and visual density. Create basic area charts with custom colors, gradients, and opacity settings in our free online maker.
- [Stacked Area](https://www.line-graph-maker.com/resources/line-charts/stacked-area): Multiple series stacked to show part-to-whole composition over time or categories. Visualize market share, resource allocation, and cumulative trends with interactive controls.
- [Stacked Line](https://www.line-graph-maker.com/resources/line-charts/stacked-line): Accumulate series vertically to compare cumulative totals without area fills. Useful when you need to show aggregated trends while keeping individual series distinguishable.
- [Gradient Stacked Area](https://www.line-graph-maker.com/resources/line-charts/gradient-stacked-area): Stacked area chart with smooth gradient fills to emphasize composition transitions. Create polished data visualizations with customizable color gradients and interactive tooltips.
- [Area Pieces](https://www.line-graph-maker.com/resources/line-charts/area-pieces): Segment the area fill by value ranges for conditional emphasis and threshold highlighting. Ideal for event-based analysis, A/B testing windows, and anomaly detection.
- [Confidence Band](https://www.line-graph-maker.com/resources/line-charts/confidence-band): Display statistical uncertainty with upper and lower bounds around a central trend line. Essential for forecasts, scientific measurements, and any data with margin of error.

### Time Series

Patterns for temporal data including dynamic updates, streaming timelines, sparklines, and race animations. Ideal for real-time dashboards and historical analysis.

- [Area with Time Axis](https://www.line-graph-maker.com/resources/line-charts/time-axis-area): Zoomable daily area chart with built-in range selector, quick export tools, and date-time axis formatting. Ideal for time-series dashboards and temporal data exploration.
- [Dynamic Line with Time Axis](https://www.line-graph-maker.com/resources/line-charts/dynamic-time-axis): Live-updating time series with streaming or windowed data for real-time monitoring. Build dynamic dashboards that auto-refresh with new data points as they arrive.
- [Function Plot](https://www.line-graph-maker.com/resources/line-charts/function-plot): Render analytic mathematical functions across a domain without raw table data. Visualize sine waves, polynomials, and custom formulas as smooth, interactive line charts.
- [Line Race](https://www.line-graph-maker.com/resources/line-charts/line-race): Animate series ranking over time to reveal competitive dynamics and historical trends. Watch data series race each other across time periods in an engaging animated chart.
- [Bump Chart (Ranking)](https://www.line-graph-maker.com/resources/line-charts/bump-chart): Track rank changes across periods with lines that swap ordering, revealing competitive dynamics and position shifts. Ideal for league tables, market share, and survey rankings.
- [Intraday Chart with Breaks](https://www.line-graph-maker.com/resources/line-charts/intraday-with-breaks): Visualize multi-day intraday data with automatic session breaks, compressing non-trading hours for clearer trend analysis. Built for financial and market data visualization.
- [Intraday Chart with Breaks (II)](https://www.line-graph-maker.com/resources/line-charts/intraday-with-breaks-2): Alternative intraday chart configuration for handling multiple discontinuities in trading sessions. Supports custom break definitions and flexible session-based time formatting.
- [Mini Line Charts (Sparkline) in Matrix](https://www.line-graph-maker.com/resources/line-charts/sparkline-matrix): Compact per-cell trend lines to compare many small multiples at a glance. Embed tiny line charts in tables or dashboards for high-density data overview without clutter.

### Scales & Axes

Logarithmic scales, multiple X-axes, polar coordinates, and category axes. Multi-axis layouts for comparing different units and granularities in a single chart.

- [Log Axis Line](https://www.line-graph-maker.com/resources/line-charts/log-axis): Logarithmic scale reveals multiplicative growth and power-law behavior across orders of magnitude. Essential for scientific data, financial growth curves, and exponential trends.
- [Multiple X Axes](https://www.line-graph-maker.com/resources/line-charts/multiple-x-axes): Two or more aligned x-axes to compare different units or granularities in a single chart. Overlay temperature and humidity, or revenue and user count, on shared timelines.
- [Y Category Line](https://www.line-graph-maker.com/resources/line-charts/y-category-line): Categorical values on the y-axis with continuous x-axis, creating horizontal progression charts. Useful for scientific profiles, depth measurements, and ordinal data series.
- [Polar Dual Value Axes](https://www.line-graph-maker.com/resources/line-charts/polar-dual-value-axes): Two value axes in polar coordinates for mathematical functions and circular comparison patterns. Create radar-style charts and angular data visualizations with interactive controls.
- [Dual-Axis Line Chart](https://www.line-graph-maker.com/resources/line-charts/dual-axis-line): Plot two metrics with different units or scales on one chart using a secondary Y-axis. Compare revenue against conversion rate, or volume against price, without one series flattening the other. Interactive example and CSV.

### Domain Templates

Ready-made line chart patterns for weather, climate, energy, and environmental data. Each template includes sample data and chart configuration you can customize.

- [Weekly Temperature Trend](https://www.line-graph-maker.com/resources/line-charts/temperature-week): Daily high and low temperatures over a week with markPoint and markLine annotations. A ready-to-use weather template with sample data and customizable chart configuration.
- [Rainfall vs Evaporation](https://www.line-graph-maker.com/resources/line-charts/rainfall-vs-evaporation): Compare monthly precipitation and evaporation trends on aligned dual axes. A climate data template with sample data, interactive tooltips, and free PNG/SVG chart export.
- [Rainfall Trend](https://www.line-graph-maker.com/resources/line-charts/rainfall): Dual-axis chart showing the relationship between rainfall and river flow with interactive data zoom. Includes sample environmental data and customizable axis configuration.
- [Air Quality Index Trend](https://www.line-graph-maker.com/resources/line-charts/beijing-aqi): Air Quality Index readings over time with threshold bands and color-coded highlights. Track environmental health metrics using this ready-to-use AQI visualization template.
- [Electricity Distribution Trend](https://www.line-graph-maker.com/resources/line-charts/electricity-distribution): Energy production or consumption trends by category or region, with intraday load curves. Visualize power distribution patterns using this template with sample utility data.

### Data & Modeling

Dataset structures, filters, and declarative transforms that power line and area charts. Learn how to aggregate, filter, and reshape data for effective visualizations.

- [Data Transform Filter](https://www.line-graph-maker.com/resources/line-charts/data-transform-filter): Filter and transform datasets client-side to show specific subsets and compare data dynamically. Learn declarative data operations for building responsive, interactive line charts.

## Templates by Industry

### Finance

Stock prices, revenue trends, budget analysis, and investment tracking.

- [Track Stock Price Trends](https://www.line-graph-maker.com/templates/finance-stock-price-trend): Visualize stock price movements over time with multi-series line charts for comparing tickers.
- [Visualize Revenue Growth Trends](https://www.line-graph-maker.com/templates/finance-revenue-growth): Track quarterly or monthly revenue across product lines with multi-series area charts.
- [Track Budget vs Actual Spending](https://www.line-graph-maker.com/templates/finance-budget-tracking): Compare planned budget against actual expenditures month by month to spot overruns early.

### Education

Student performance, exam scores, enrollment trends, and learning analytics.

- [Track Student Performance Over Time](https://www.line-graph-maker.com/templates/education-student-performance): Monitor student grades and assessment scores across semesters with trend lines.
- [Track Enrollment Trends Over Time](https://www.line-graph-maker.com/templates/education-enrollment-trends): Visualize student enrollment numbers by program or department across academic years.

### Science

Experiment results, climate data, population studies, and research trends.

- [Plot Experiment Results](https://www.line-graph-maker.com/templates/science-experiment-results): Chart experimental observations with error bands and multi-variable comparison lines.
- [Chart Climate Temperature Changes](https://www.line-graph-maker.com/templates/science-climate-temperature): Plot historical temperature anomalies and seasonal patterns to visualize climate trends.
- [Visualize Population Growth Curves](https://www.line-graph-maker.com/templates/science-population-growth): Chart population changes over decades with projections and regional comparisons.

### Marketing

Website traffic, conversion rates, campaign performance, and growth metrics.

- [Track Website Traffic Trends](https://www.line-graph-maker.com/templates/marketing-website-traffic): Visualize daily or monthly website visits, page views, and traffic sources over time.
- [Track Conversion Rate Trends](https://www.line-graph-maker.com/templates/marketing-conversion-funnel): Monitor conversion rates across funnel stages over time to optimize marketing spend.
- [Track Social Media Follower Growth](https://www.line-graph-maker.com/templates/marketing-social-media-growth): Visualize follower counts and engagement metrics across platforms over time.

### Government

GDP trends, unemployment rates, public spending, and economic indicators.

- [Visualize GDP Trends by Country](https://www.line-graph-maker.com/templates/government-gdp-trends): Compare GDP growth across countries or regions with multi-series line charts.
- [Chart Unemployment Rate Trends](https://www.line-graph-maker.com/templates/government-unemployment-rate): Compare unemployment rates across regions or demographics with multi-series line charts.

### Healthcare

Patient outcomes, disease prevalence, treatment efficacy, and health metrics.

- [Track Patient Outcomes Over Time](https://www.line-graph-maker.com/templates/healthcare-patient-outcomes): Monitor recovery metrics, readmission rates, and treatment outcomes with trend analysis.
- [Track Vaccination Coverage Over Time](https://www.line-graph-maker.com/templates/healthcare-vaccination-rate): Visualize vaccination rates by age group or region to monitor public health campaigns.

## Feature Details

### Data Import
- Paste CSV or TSV data directly into the editor
- Upload CSV, TSV, or Excel (.xlsx) files via file picker or drag-and-drop
- Automatic delimiter detection and header row parsing
- Support for numeric, date, and categorical columns

### Chart Customization
- Chart types: basic line, smooth line, step line, area, stacked area, stacked line
- 5 built-in color themes (Default, Ocean, Forest, Sunset, Grape) plus custom colors
- Line styles: solid, dashed, dotted; curve modes: linear, smooth, step
- Dual Y-axis support for comparing series with different scales
- Logarithmic scale option for exponential data
- Data point markers: circle, square, triangle, diamond

### Annotations
- Reference lines (horizontal/vertical) with custom labels
- Mark points to highlight specific data values
- Shaded areas to emphasize date ranges or value ranges
- Custom tooltip formatting

### Export Options
- PNG download (high resolution)
- Copy chart image to clipboard
- Shareable link with embedded chart data
- Embeddable iframe code for websites and blogs
- SVG export for print-quality graphics

### Localization
- English (en) — default
- Spanish (es)
- Portuguese (pt)
- Chinese Simplified (zh-CN)
- Chinese Traditional (zh-TW)
- All UI elements, chart labels, and content pages are fully translated

## Technical Details

- Built with Next.js (App Router) and React
- Charts rendered with ECharts (Apache ECharts)
- Responsive design — works on desktop, tablet, and mobile
- No user accounts or authentication required
- No data is stored on servers — all processing happens in the browser
- Open-source chart configurations

## Optional

- [About](https://www.line-graph-maker.com/about): About the tool and team
- [Contact](https://www.line-graph-maker.com/contact): Get in touch
- [Privacy Policy](https://www.line-graph-maker.com/privacy): How we handle your data — no tracking of chart data
- [Terms of Service](https://www.line-graph-maker.com/terms): Usage terms