Eternalsix

Free tools. Optional $5 Pro.

Every tool is free and runs in your browser. Pay once — $5, no subscription — only if you want batch processing, an API, and shareable links.

Free
$0

Everything you need for everyday use.

  • Every tool, unlimited use
  • Runs 100% in your browser
  • No signup, nothing uploaded
Pro · per tool
$5 one-time

For power users, on supported tools.

  • Batch process up to 5,000 lines
  • API access with your own key
  • Shareable save links
  • No account needed to buy · pay by email

Tools with Pro features

Base64 Encode / DecodeCase ConverterHash GeneratorJSON FormatterUnix Timestamp ConverterURL Encode / Decode
Browse all tools →

Frequently asked questions

Are the tools really free?
Yes. Every tool runs entirely in your browser with no signup and no limits — nothing you paste is uploaded. You only pay if you want the optional Pro features.
What does the $5 Pro unlock include?
For supported tools, Pro adds server-side batch processing (up to 5,000 lines at once), programmatic API access with your own key, and shareable save links. It's a one-time payment per tool — no subscription.
Do I need an account to buy Pro?
No. You can pay with just your email and get instant access on your device. Logging in later with the same email syncs the unlock across your other devices.
Is Pro a subscription?
No. Pro is a single one-time payment per tool, and it's yours to keep. There are no renewals or recurring charges.