The free tools on this site already parse everything in your browser β nothing is uploaded. That is true, and it is also beside the point, because you cannot prove it to your security team from inside a browser tab.
So what actually happens is this: you sanitise a message, or retype one from a screenshot, or work with a sample that is close enough. The real one β the one with the PAN, the track data, the cryptogram, the one you are actually debugging at 2 a.m. β gets read by counting bytes by hand.
The offline edition removes the argument. The files sit on your disk. They contact nothing. You can disconnect the machine and they still work.
| Free site | Offline edition | |
|---|---|---|
| Parsing | In your browser | In your browser |
| Runs without a network | No | Yes |
| Ads and analytics | Yes | None |
| Works inside a locked-down network | Usually blocked | Yes |
| Articles and reference tables | Yes | Linked back to the site |
If you only ever work with test data, the free site is the same tool and costs nothing. This edition is for when that stops being enough.
This is a fixed build, not a subscription: you get the files listed above, not everything added to the site later. The newer EMV bit-string decoders (AIP, TSI, CID, ATC, IAD, CVM List) are free on the site and are not in this build.
Card, Apple Pay, Google Pay or WeChat Pay. No account to create; you enter an email at checkout so the receipt reaches you. The download link appears the moment payment clears and keeps working for 7 days, on any machine, for up to four downloads. Any sales tax that applies where you are is added at checkout. Buying on a company card? Checkout has an Add business information step for your company name and tax/VAT number. Waffo.com Limited is the merchant of record for the sale and is the party that collects and remits that tax. Team licences: chenshiwei509@gmail.com
A note on what this is not: a browser tab is not a vault. This edition removes the network from the equation; the usual rules about the machine you handle live cardholder data on still apply.