Runs in
On-chain bench
Hashed in this tab. Nothing about the signature leaves the browser.
On-chain · Free now
Signature Inspector
Paste the signature request a site is asking you to approve and find out what it actually does. Recomputes the digest your wallet is about to sign, names the spender, and says plainly whether the amount is unlimited.Your data stays in this tabGives you Digest, Risk notes, TXT
Signature Inspector is ready for input.
Hashed in this tab. Nothing about the signature leaves the browser.On-chain bench
Free nowNo upload0 selected · 0 BDigestRisk notesTXT
Step 1
Set controls
Step 2
Run tool
Waiting for files and settings.
0%
Pick files and run the tool.
Notes
Compare the digest against the one your wallet shows. If they differ, something between you and the contract changed the request.
A permit is an approval. It moves no funds by itself and it leaves no transaction in your history, which is exactly why it is worth reading.
Workspace controls
Save a full workspace when you want the tool state, files, and team note preserved together.
Versions and sharing
Output versions appear here after successful runs so users can compare before exporting again.
Run detailsRunnable
What this tool does
Limit
Results depend on source quality and selected settings. The tool reports failures instead of silently claiming completion.
Input
No upload required; complete the visible controls. What am I actually signing. Recomputes the digest your wallet is about to sign, and says in plain English what it lets someone do.
The Run button stays disabled until the required input is ready.
Output
Digest, Risk notes, TXT. Output names, file sizes, result notes, and downloads stay in the same workspace.
Results stay with the settings and source files used for the run.
If it fails
The workspace preserves staged settings, queue state, run progress, errors, retry, result versions, presets, and export bundles.
The console keeps the error and lets you retry the same setup.
Input readiness checkVisible run progressExplicit success or error stateDownload and rerun path
Inputs and features
Optional input
LimitedNothing to upload. Paste the hex or the JSON.
Camera capture
LimitedNot used by this tool group.
Clipboard paste
ReadyPaste calldata or a typed-data request straight from the wallet prompt.
Import package
ReadyRestore saved contract labels and signature notes.
Share setup
ReadyShare a decoded reading without sharing the wallet it came from.
Export package
ReadyDownload the decoded reading and its risk notes as TXT.
Saved workspacesPresetsRecent jobsRerun historyBatch queueProgress and ETACancel and retryMobile camera inputClipboard intakeCloud import and export
Language and help
4h first response
Related tools
Support notes
Support path
On-chain bench
4h first response
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Use it forAnyone who has ever stared at a wallet popup full of hex and clicked sign anyway.
Good to knowA permit is an approval by signature. It moves no funds by itself, leaves nothing in your transaction history, and is how a lot of wallets get drained. This reads one before you sign it.
- EIP-712
- Permit check
- Unlimited approval
- Digest compare
- Offline
Where your data goesNowhere. The work happens in this tab.