Mask JSON Before Sending to AI — 100% in Your Browser

Use the JSON Prompt Shield to mask keys and string values in any JSON payload before pasting into ChatGPT or other AI tools. Numbers stay unchanged; structure is preserved. Fully reversible with a mapping file—no data is ever sent to our servers.

How it works: Paste your JSON, choose what to mask (keys, strings, or both), copy the masked output. Send that to AI. Use the mapping to restore AI responses to your real field names. No signup, no tracking.

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Secure AI JSON Prompt Shield

High-performance JSON payload masking: keys → K_00001, string values → S_00001. Numbers unchanged. Structure preserved. 100% client-side, fully reversible.

100% Data Security—nothing sent to servers
Client-side only—runs in your browser

Mask JSON payload

Paste JSON → mask keys and string values → copy and send to AI → paste AI response below and restore.

Original JSON
Masked output

Restore AI response

Paste the AI's JSON reply (with K_00001, S_00001, etc.) and restore to original keys/values

Keys → K_00001, string values → S_00001. Numbers and null unchanged. Iterative traversal supports large payloads (MBs). All processing in your browser.