About CIDR Calculator Online
Compute network, broadcast, and host range for an IPv4 CIDR. This web tool runs on TheFatBaby’s production platform with the same credit wallet as /v1/tools/cidr. Priced at zero credits for successful runs where applicable. Sign in to process file jobs, download results before retention expires, and call the matching REST endpoint when you are ready to automate.
How to use
- Open CIDR Calculator and fill in: CIDR.
- Click Process to run the utility.
- Copy or download the result from the page.
- Automate the same operation with the matching FatBaby REST endpoint when ready.
Features
- Fast browser processing
- Form-based text/options input
- API: POST /v1/tools/cidr
- Shared FatBaby credits and auth
Use cases
- Use CIDR Calculator for one-off public-URL checks and captures
- Confirm SSRF-safe behavior before scripting
- Move to Screenshot / HTML-to-PDF / Scraping APIs for scale
Privacy and credits
Temporary outputs expire on a short retention window. Track usage from the dashboard ledger. Pricing is the same for tools and API calls that share an operation.
Related tools
Category: web tools · Related API · Documentation
Automate with the API
Ready to ship? Authenticate with Authorization: Bearer fb_live_… against https://www.thefatbaby.com/api. Official SDKs are under Developers → SDKs.
FAQ
How many credits does this use?
About 0 credits per run (same rate as the public API).
Where are uploaded files stored?
Temporary processing files are cleaned up on a short retention window (typically within 24 hours). Do not upload secrets you cannot afford to expose.
Do I need an account?
Yes for file tools. Sign in with your FatBaby dashboard account — no API key paste required in the browser.