Editverse Free Chart Tool – GraphPro
GraphPro – Free Online Graph Maker for Researchers — 25 Graph Types With Built-In Statistics
Paste your data and build publication-ready bar charts, box plots, scatter plots, forest plots, Kaplan–Meier curves and 20 other chart types directly in your browser. Six chart types run a significance test as you build (t-test, ANOVA, correlation, chi-square), each with an exact p-value, and every chart exports as an editable SVG for PowerPoint or Inkscape. No signup, nothing leaves your browser.
In Simple Words
Editverse GraphPro is a free chart-building tool built specifically for the way researchers actually work. You paste or type your data into a spreadsheet-style grid, pick a chart type, and the tool draws it. For six chart types — scatter, box plot, violin plot, error bar, correlation matrix, and bar chart — it also runs the matching statistical test and shows the exact p-value in the Statistics tab, with an option to print it on the chart.
If you are not sure which chart or test fits your question, the Quick Analysis tool asks in plain language whether you are comparing two groups, comparing three or more groups, or checking whether two variables are related, then builds the right chart and runs the right test automatically.
When to Use This Tool
Reach for GraphPro at the exact moment you need a figure for a manuscript, thesis chapter, or conference poster and want to know, while you are still looking at the data, whether the difference you are seeing is likely to be real. A box plot with a built-in Welch t-test or one-way ANOVA answers both questions from the same screen, which is faster than building the chart in one tool and running the test in another.
For a single confirmatory number rather than a chart, Editverse’s dedicated calculators go deeper: the t-test calculator, correlation calculator, and chi-square calculator report the same statistics with more diagnostic detail. Use GraphPro when you need the figure itself; use the calculators when you need the test written up on its own.
Free Online Chart Maker with Built-in Statistics
Editverse GraphPro is a free, browser-based chart builder for researchers. Build publication-ready charts across 25 types — bar, line, scatter, box plot, correlation matrix, forest plot, Kaplan–Meier, and more — each exportable as an editable SVG for PowerPoint or Inkscape. Six chart types include built-in significance testing (Welch t-test, one-way ANOVA, Pearson/Spearman correlation, chi-square test of independence), each with an exact p-value.
- Bar / Column Chart — Compare values across groups
- Line Chart — Trends over an ordered axis
- Area Chart — Trends with filled magnitude
- Scatter Plot — Relationship between two variables
- Pie / Doughnut Chart — Parts of a whole
- Histogram — Distribution of one variable
- Box Plot — Spread, quartiles & outliers
- Heat Map — Matrix of values by colour
- Violin Plot — Distribution density by group
- Radar Chart — Multivariate profiles
- Bubble Chart — Three variables at once
- Error Bar Chart — Group means \u00b1 SD
- Correlation Matrix — Pairwise correlations
- Stacked Bar Chart — Composition within groups
- Waterfall Chart — Cumulative additions & subtractions
- Dual-Axis Chart — Bars + line on two scales
- Forest Plot — Effect estimates with 95% CI
- Kaplan\u2013Meier Curve — Survival over time
- ROC Curve — Classifier performance (AUC)
- Bland\u2013Altman Plot — Method agreement
- Funnel Chart — Stage-by-stage drop-off
- Treemap — Nested proportions by area
- Sankey Diagram — Flows between nodes
- Network Diagram — Nodes & connections
- Bullet Chart — Actual vs target
Which Chart Should I Use?
Comparing two groups
Use a box plot, violin plot, or error bar chart. The Statistics tab reports both a Welch t-test (for roughly normal groups) and a Mann-Whitney U test (for skewed, ordinal or small-sample data). Under Group comparison, choose Parametric to print the t-test on the chart or Nonparametric to print the Mann-Whitney result. The default, None, only leaves the chart unannotated; it does not mean no test applies.
Comparing three or more groups
Once a third group is added, the same three chart types switch to omnibus tests: one-way ANOVA for roughly normal groups with similar spread, Kruskal-Wallis for skewed or ordinal data. Choose Parametric (ANOVA) or Nonparametric (Kruskal-Wallis) under Group comparison to print the matching result on the chart. GraphPro deliberately reports this omnibus test rather than uncorrected pairwise comparisons, which inflate the false-positive rate.
Checking whether two variables are related
Use a scatter plot. GraphPro fits a trend line and reports Pearson r or Spearman ρ with its p-value, or a correlation matrix for more than two variables at once.
Comparing categories or counts across groups
Use a bar chart or stacked bar chart with a chi-square test of independence, but only when the bars represent raw counts. If your bars show means, use a box plot or error bar chart instead.
Method agreement, survival, or classifier performance
GraphPro also builds Bland-Altman plots (bias and 95% limits of agreement), Kaplan-Meier curves (survival over time), ROC curves (AUC), and forest plots (effect estimates with 95% CI) for meta-analyses and systematic reviews.
What Editable-SVG Export Means for You
Every chart GraphPro draws is real, editable vector text and shapes, not a picture. Insert the exported SVG into PowerPoint, then right-click and choose Group, then Ungroup twice. Every bar, line, and label becomes an individually editable native PowerPoint shape.
The same file opens directly in Inkscape for full vector editing. Fonts are restricted to a journal-safe set (Segoe UI, Arial, Helvetica, Times New Roman, Georgia) so the exported figure still looks correct on a computer that does not have the original font installed.
Nothing is uploaded to a server to make this work. Parsing, chart rendering, and every statistical test run as JavaScript in your own browser tab, which is also why GraphPro does not require an account or store your data anywhere.
Common Mistakes
Using a bar chart for small-sample continuous data
A systematic review of 703 physiology papers found that most presented continuous data as bar and line graphs even though many different underlying distributions can produce the identical bar height (Weissgerber et al., 2015). A box plot or violin plot shows the actual spread and any outliers.
Running separate pairwise t-tests across three or more groups
Comparing every pair separately inflates the false-positive rate. GraphPro’s box, violin, and error bar charts switch to an omnibus test (one-way ANOVA or Kruskal-Wallis) instead of pairwise tests once a third group is added, for exactly this reason.
Applying a chi-square test to percentages or means instead of raw counts
The chi-square test of independence assumes each cell is a count. GraphPro’s bar and stacked bar charts flag this directly in the Statistics tab if the values you paste look like summary statistics rather than counts.
Ignoring low expected cell counts in a small contingency table
When more than 20% of a table’s expected cell counts fall below 5, the chi-square approximation becomes unreliable. GraphPro surfaces this as a caution and points to Fisher’s exact test as the more appropriate alternative for very small samples.
Reaching for a 3D chart when a 2D one would be clearer
For readers deciding whether a rotated 3D bar or pie chart actually helps communicate the data, our guide on 3D graphs in academic writing: when they work and when to avoid them covers that decision directly, and GraphPro deliberately sticks to 2D bar, scatter, box, and violin charts, which present the same comparisons without the depth-perception distortion a 3D effect introduces.
Frequently Asked Questions
Is Editverse GraphPro really free?
Yes. There is no signup, no watermark beyond a small editverse.com credit, and no limit on how many charts you build.
Can I still edit the chart after exporting it to PowerPoint?
Yes. The export is a real SVG, not a picture. Ungrouping it twice in PowerPoint turns every element into an independently editable native shape.
Does GraphPro replace SPSS, GraphPad Prism, or R?
No. GraphPro is built for the common case of building a clean figure and checking a single significance test while you look at the data. For multivariate models, mixed-effects designs, or a full analysis write-up, use a statistics package, or see Editverse’s statistical analysis service.
Which chart types include a built-in p-value?
Scatter plot, box plot, violin plot, error bar chart, correlation matrix, and bar or stacked bar chart (chi-square test of independence, for count data).
Related Tools
References
- Weissgerber TL, Milic NM, Winham SJ, Garovic VD. Beyond bar and line graphs: time for a new data presentation paradigm. PLoS Biol. 2015;13(4):e1002128. PMID 25901488.
- Streit M, Gehlenborg N. Bar charts and box plots. Nat Methods. 2014;11(2):117. PMID 24645191.
- Tufte E. The Visual Display of Quantitative Information. Cheshire, CT: Graphics Press; 1983.
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