Free tool
CID Converter
Convert a Google Maps CID between decimal and hex. Paste a Maps hex pair (0x…:0x…) and get the decimal CID used in links.
Pull Place ID + CID from a URL with the ID Extractor, or get them in one click via Basic Audit.
Decimal CID in one doc, hex pair in another—and the link breaks
Google Maps URLs often use hex CID pairs while tools and spreadsheets store decimal CIDs. One wrong format and Maps or Posts links fail.
Who it's for
SEOs working legacy exports
Convert decimal CIDs from old tools into hex (or the reverse) for modern URLs.
Developers building Maps links
Normalize CID formats before generating Maps or Google Posts URLs.
Support & ops
Fix broken client links when CID format does not match the destination.
Use cases
Decimal ↔ hex conversion
Paste either form and get the other instantly.
Hex pair from Maps
Paste a 0x…:0x… pair from a Maps URL and recover the decimal CID.
Quick Maps / Posts jump
Open Maps or Google Posts shortcuts built from the converted CID.
How it works
Paste a CID
Enter a decimal CID or a Maps-style hex pair.
Convert
Read the matching decimal and hex forms.
Open or copy links
Use the quick Maps and Posts links, or copy the values into Link Pack.
What you get
- Bidirectional decimal and hex CID conversion
- Accepts Maps hex pairs from live URLs
- Shortcut links for Maps and Google Posts
- No signup
- Works with ID Extractor and GBP Link Pack
FAQ
What does a hex pair look like?
Maps URLs often include two hex values like 0x…:0x…. The second value commonly encodes the CID used in decimal form elsewhere.
Is CID enough for review links?
Review request links usually need Place ID (writereview?placeid=…). Use CID for certain Maps and Posts URL patterns; use Place ID Finder for reviews.
Can conversion fail?
Invalid or truncated values will not convert. Re-copy the CID from Maps or run ID Extractor on a full place URL.
Related free tools
Paste a Google Maps or Search URL and pull Place ID, CID, and KG ID.
Turn Place ID, CID, and KG ID into Maps, review, posts, and Knowledge Panel links.
Paste a Google Maps URL and extract the Place ID for review links and APIs.
Generate a Google review request link and printable QR code from a Place ID.
Need the full profile in one click? Basic Audit exports Place ID, CID, KG ID, and links from Google Maps.
Run audits on Google Maps
Install GMB Audit Tool to pull Place ID, CID, categories, reviews, and competitor scans without copy-paste.
Add to Chrome — free