How to Save Your Synastry (Relationship) Chart as a PDF & Share It

A synastry chart is the part of astrology built for two. Instead of one person's natal wheel, it overlays two birth charts to show how your planets interact with someone else's — the aspects that spark attraction, the ones that cause friction, and the quiet patterns underneath a relationship. It is one of the most personal charts you can generate, and exactly the kind you want to keep rather than lose to a closed browser tab. Saving it as a PDF makes it printable, shareable with your partner, and permanent. Here is the full workflow.

Step 1: Generate a synastry chart worth keeping

A synastry reading needs accurate birth data for both people — date, time, and place for each — so start with a tool built specifically for comparing two charts rather than one that bolts it on as an afterthought. A free, focused option is Synastry Chart, which overlays both birth charts in a single bi-wheel and breaks down the inter-aspects between the two — Sun–Moon connections, Venus–Mars dynamics, the harmonious trines and the tense squares — in plain language alongside the wheel. Because it renders the comparison cleanly with the aspect grid and interpretations on the page, it exports to PDF without the layout falling apart, which is half the battle when you want a keepsake rather than a cluttered screenshot.

Step 2: Save the chart as a PDF

Every modern browser can turn the chart page into a PDF — no extension required:

1. With the synastry chart on screen, press Ctrl + P (Windows) or Cmd + P (Mac).
2. Choose Save as PDF as the destination instead of a printer.
3. Switch to landscape if the bi-wheel is wide, and enable background graphics so the aspect-line colors survive.
4. Give it a descriptive name — more on that below.

On a phone, the share menu does the same job: Share → Print → Save as PDF on both iOS and Android. If you only managed a screenshot, turn the image into a clean PDF page with our free JPG to PDF converter instead.

Step 3: Combine the wheel and the written reading

A synastry reading is usually two parts: the bi-wheel chart and the page (or pages) of aspect interpretations. Save each as a PDF, then combine them into one document with our Merge PDF tool. A structure that reads well:

• Cover page — both names and the date you ran the comparison.
• The bi-wheel — the visual chart overlaying both birth charts.
• Aspect interpretations — the written breakdown of how the two charts interact.
• Each partner's natal chart — optional, merged in at the back for context.

If a page came in sideways or you want to pull just the wheel out to send on its own, our Rotate PDF and Split PDF tools handle it without rebuilding the file.

Step 4: Share it privately

A synastry chart is intimate by nature — it is built on two people's birth details, so treat it accordingly when sharing:

• Password-protect it. Before sending the chart to your partner, add a password or restrict editing with the Protect PDF tool so the file stays private even if a message is forwarded.
• Compress it for messaging. A chart-plus-reading PDF can get heavy; the Compress PDF tool shrinks it so it sends over email or chat without bouncing.

Naming & organizing

If you read charts for several relationships — your own, friends', family — a clear naming scheme keeps them straight: synastry-alex-jordan-2026-06-16.pdf. Keep a single folder of comparison PDFs and you build a small relationship-astrology archive you can revisit as things evolve.

Frequently asked questions

What is the difference between a synastry chart and a composite chart?

A synastry chart overlays two separate birth charts to compare how each person's planets aspect the other's. A composite chart mathematically merges the two into a single “relationship chart.” Many people save both as pages in the same PDF for a fuller picture.

Do I need an exact birth time for both people?

For the most accurate synastry, yes — house placements and the Moon's position shift with time of day. If one birth time is unknown, the planet-to-planet aspects are still meaningful; just note on the chart that the houses are approximate.

Is it safe to share a chart with someone else's birth details?

Treat birth data as personal information. Ask before generating a chart with someone else's details, and password-protect the PDF before sharing so it is not passed around beyond the two of you.

The bottom line

A synastry chart is too personal to leave in a browser tab. Generate a clean comparison with a focused tool like synastrychart.org, save the wheel and the reading as PDFs, and combine, protect, and share them with the free tools here on PDFDrives. In a few minutes you turn a fleeting on-screen reading into a private keepsake you and your partner can keep, print, and come back to.