How do I make a timeline to scale?

Enter one event and its year or ISO date on each line in the proportional tool below the input. Use the timeline generator to scale the gaps by elapsed calendar time, so equal intervals occupy equal distances. Choose horizontal or vertical orientation, then export the figure.

Which date formats can I use?

Use years from 1 to 9999 or complete ISO dates such as 2026-03-14. A year represents January 1 of that year. Invalid calendar dates are reported rather than skipped; BCE dates and year zero are outside this version’s range.

What happens when several events share a date?

Events on the same date share the same position on the time axis. Their labels are separated so the entries remain visible. Label spacing does not change the underlying event date.

Can I make horizontal and vertical timelines?

Yes. Switch orientation in the proportional tool. Both layouts use the same elapsed-time calculation, letting you choose a wide figure for slides or a tall figure for a report.

Can I save and reopen my timeline?

Yes. Save the tool settings as a JSON file and load that file to restore the event list and layout. This local file keeps the inputs for later revisions; it does not publish the timeline.

Can I export SVG or PNG without an AI generation?

Yes. The proportional mode calculates and renders directly from your event list, and exports SVG or PNG. The original AI input remains available above it for a more illustrative timeline or a broader workflow diagram.

Free Timeline Generator to Scale

Make a timeline to scale from your dated events, with horizontal or vertical layouts and SVG or PNG export.

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Proportional timeline

Enter event labels and years or ISO dates (0001–9999). Positions follow the actual time between events.

OrientationHorizontalVertical

Event label 1Year or date (YYYY-MM-DD) 1

Event label 2Year or date (YYYY-MM-DD) 2

Event label 3Year or date (YYYY-MM-DD) 3

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Free Timeline Generator to Scale— templates & examples

Updated 2026-10-17

Dates with meaningful distance

Free Timeline Generator to Scale

Show how long events are apart, with labels that remain readable in your report or presentation.

A proportional timeline places events according to elapsed time rather than evenly spaced cards. Use this timeline generator with years or complete ISO dates to compare research milestones, historical developments or an experiment’s schedule. The tool sorts the dates, keeps simultaneous events at one time position and separates their labels. Switch between horizontal and vertical layouts, save the settings locally and export SVG or PNG for your document. The AI input remains available for illustrated timelines.

Build a dated timeline

Proportional timeline with 1900, 1950 and 2000 at equal fifty-year intervals

Use years or ISO dates
Preserve proportional date spacing
Choose horizontal or vertical layout
Save JSON and export SVG or PNG

Proportional Timeline Generator Features

The proportional timeline generator turns a dated event list into a time-scaled figure with calendar validation, readable labels and local export.

Make the distance between dates meaningful

A milestone list can hide a long gap between two events when every card receives the same space. Use the timeline generator to scale the distance between milestones according to the elapsed time. Each event is positioned between the earliest and latest date. For a year-based example, 1950 lies halfway between 1900 and 2000. Use the result when the duration between milestones is part of the explanation, while retaining the dates as visible labels.

Position events by elapsed time
Sort dates into chronological order
Keep the source date beside each event

Create a proportional timeline

Work with calendar dates and shared milestones

Enter complete ISO dates for a study schedule or use years for a longer history. Calendar validation identifies impossible dates rather than quietly removing a row. When several events happen on the same date, their markers retain the same time coordinate while labels occupy separate positions. That makes a shared milestone readable without inventing an interval between its events.

Use years or YYYY-MM-DD dates
Identify invalid calendar dates
Separate labels for simultaneous events

Create a proportional timeline

Fit the timeline to the document

Choose a horizontal layout for a presentation or a vertical layout for a narrow report column. The orientation changes the presentation while preserving the calculation of time positions. Long labels can be distributed around the axis, helping readers connect each explanation with its dated marker rather than mistaking label spacing for the time scale.

Switch horizontal and vertical orientation
Retain proportional event positions
Read long and simultaneous labels

Create a proportional timeline

Keep inputs and export a reusable figure

Use the proportional timeline generator to save the event list and layout settings in a JSON file before sharing the finished image. Reloading that file restores the inputs for a later revision. Export SVG for vector editing or PNG for documents and slides. These local actions use the proportional tool directly, so a dated timeline can be prepared without starting an AI generation.

Save and reload JSON settings
Export a vector SVG figure
Download a PNG for documents

Create a proportional timeline

How to Make a Timeline to Scale

Prepare dates and labels, review the calculated layout, then keep the inputs and the exported figure together.

Enter dated events
Write one event per line using the input format shown in the tool. Use a year for broad historical milestones or an ISO date when the day matters. Include a short label that explains what happened.
Review dates and the time scale
Check validation messages and correct impossible dates before exporting. Inspect the first and last events and a known middle date to confirm the intended span. Events are sorted chronologically rather than kept in an accidental input order.
Choose orientation and inspect labels
Switch between horizontal and vertical views to fit the destination. Review crowded periods and simultaneous events. Separate label placement keeps the time markers at their calculated positions, preserving the meaning of the gaps.
Save settings and export the figure
Download JSON settings for future changes, then export SVG or PNG for the report or presentation. Keep the source dates with your project so readers and collaborators can verify the milestone sequence.

Timelines for Research, Teaching and Reports

Choose a proportional layout when the gap between events contributes to the explanation, from a century of discoveries to a study schedule.

Explain the pace of a research field

Place selected discoveries from a literature review on a year-based scale. A long quiet interval stays visually longer than a cluster of nearby publications, helping the reader discuss the pace of development without inferring it from evenly spaced cards.

Explore this example

Research milestones positioned by their calendar dates

Prepare a study milestone overview

Use approved calendar dates for protocol review, recruitment, data collection and analysis. A proportional overview shows where the scheduled gaps fall. Keep it beside the detailed plan when discussing timing with collaborators; this figure does not assign resources or track task completion.

Explore this example

Vertical proportional timeline from baseline in 2022 to final assessment in 2024

Compare stages of a laboratory experiment

Plot planned dates for preparation, measurement and follow-up. The date gaps provide a quick view of the sequence for a lab meeting. Events that share a day can retain separate labels without being moved to different dates for visual convenience.

Explore this example

Teach chronology with meaningful gaps

Enter historical events whose intervals differ substantially. Compare the displayed distances with the dates to explain what a time scale encodes. The 1900, 1950 and 2000 example offers a simple check before introducing a less regular sequence.

Explore this example

Events sharing a date retain the same time position with separate labels

Present milestones that occurred together

Show a release, report and meeting recorded on one date as separate labeled events at the same time position. The figure communicates coincidence while keeping every entry visible, useful when preparing a project history from several records.

Explore this example

Year timeline with 2000, 2005 and 2025 showing a short and a long gap

Revise a timeline for a later report

Reload saved JSON settings, add a newly confirmed date and inspect the updated range. Export a fresh vector figure for the report. Keeping the inputs alongside the exported image makes subsequent revisions easier to reproduce.

Explore this example

How Researchers Use the Timeline Generator

My seminar compared discoveries separated by very different intervals. I used the timeline generator to scale the spacing between discoveries to the elapsed time, then checked where the middle dates fell. The exported SVG gave the class a clear reference for discussing the long gaps as well as the crowded periods.

Eleanor Hughes

History of science lecturer, University of Leeds

Our study overview needed to show the space between recruitment, collection and analysis dates. I used the timeline generator to scale the gaps between recruitment, collection and analysis to the time between them. I saved the inputs before exporting, so revising a confirmed milestone meant updating the dates rather than rebuilding the figure from scratch.

Mateo Rossi

Clinical research coordinator, University of Bologna

Several measurements were scheduled for the same day, and spreading them along a regular list suggested a sequence we did not intend. I used the timeline generator to scale the spacing between measurements to the time between them. Separate labels made each measurement readable, and the vertical export fitted beside our protocol notes.

Nadia Chen

Laboratory research officer, University of Melbourne

For a project retrospective, I collected the dates of reports, meetings and releases from our records. I used the timeline generator to scale the gaps between those milestones to their actual time intervals. Keeping the JSON settings with the report made later corrections straightforward when another date was confirmed.

Felix Wagner

Research project analyst, Max Planck Institute for Innovation and Competition

The first draft of our research summary had too much text for a landscape figure. Switching to a vertical layout in the proportional timeline generator gave the labels more room without changing the dates they described. I exported PNG for the review document and kept the settings file so the next revision could use the same inputs.

Daniel Okafor

Research communications editor, University of Bristol

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