Going In Circles — Builder

Create a custom circle puzzle to hide coordinates or images for geocaching.

1. Choose an Image

JPEG, PNG, GIF, or WebP. Max 15 MB. Square images work best (the puzzle is 512×512). Non-square images are padded with white bars.

Your image is processed in the browser — only a small downsampled version is sent to our server. The original never leaves your device.

2. Geocache Options (optional)

The GC code for your cache. Adds a banner linking to the cache page.

Adds a Certitudes solver validation block at the bottom. Only enable if you've set up a Certitudes entry for this cache.

3. Verify Coordinates (optional)

A quick utility for the puzzle author. Paste the coordinates hidden in your image (in any common notation) and click Go (or press Enter) to open the Coordinate Converter in a new tab. Useful for confirming the format you encoded is recognizable before publishing.

When enabled, players who solve the puzzle and see coordinates in the image get the same Convert helper at the bottom of the page — one tap to verify their reading.

Recognized formats (auto-detected)
  • Decimal Degrees (DDD): 51.5008, -0.1247
  • Degree Decimal Minutes (DDM): N51° 30.042 W000° 7.476
  • Degrees Minutes Seconds (DMS): N51° 30' 2.52" W0° 7' 28.56"
  • Reverse Wherigo (Waldmeister) — 3 sets of 6 digits: 015301 506204 068070
  • Reverse Wherigo Day 1976 — 2 sets of 5 chars: AP8JF A99WI
  • Plus Code (Open Location): 9C3XGV4C+XH
  • UTM: 30U 699319 5710158
  • MGRS: 30UXC9931910158
  • Geohash: gcpuvpmm2d79
  • Maidenhead Locator: IO91WM
  • British National Grid (OSGB): TQ299805
  • What3Words: gums.clubs.terms
  • NAC / Geohex / Geo3x3 / Mapcode — also auto-detected

When an input could match more than one format, the converter shows a picker so you can choose.

4. Reveal Options (optional)

Fades in the full image once the player has cleared most of the circles. Helpful for puzzles where the final detail is hard to see.

5. Preview & Generate

Your Puzzle Link

Share this link — anyone who opens it will see the circle puzzle.

HTML Embed Code

Paste this into your geocache listing to embed the puzzle link.

Image Embed Code

Like the link above, but wraps a clickable image. Defaults to the standard "Going In Circles" thumbnail.