SmartField vs iFrame Payment Fields
A direct comparison of SmartField and iFrame Payment Fields for protecting sensitive form data.
iFrame Payment Fields
iFrames isolate payment forms in a separate origin. They add latency and styling limitations.
// With iFrame Payment Fields:
document.querySelector('input').value
// "SensitiveData123" ← readable
SmartField
SmartField uses Shadow DOM (no iframe overhead), supports custom CSS variables, and works for any field type.
// With SmartField:
document.querySelector('smart-field').value
// "eyJ2IjoxLCJpdiI6..." ← AES-256 encrypted
Comparison
| Feature |
iFrame Payment Fields |
SmartField |
| Encrypts keystrokes | No | Yes |
| Blocks JavaScript access | No | Yes |
| Blocks screen recorders | No | Yes |
| Blocks bots | No | Yes |
| Works for any field type | Limited | Yes |
The Bottom Line
SmartField uses Shadow DOM (no iframe overhead), supports custom CSS variables, and works for any field type. SmartField uses AES-256-GCM + RSA-2048 encryption inside a closed Shadow DOM with WeakMap isolation. 13 independent security layers. 20/20 attacks blocked.
Frequently Asked Questions
Why choose SmartField over iFrame Payment Fields?+
SmartField uses Shadow DOM (no iframe overhead), supports custom CSS variables, and works for any field type.
Can I use both together?+
In most cases, yes. SmartField complements existing security measures. It adds encryption at the input level, which iFrame Payment Fields does not provide.
How hard is it to switch?+
SmartField is a drop-in replacement. Change your input tag to smart-field and add the script. 2 lines of code. Your backend receives encrypted data and decrypts with one function call.
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