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On-chain · Free now
Merkle and Airdrop Builder
Turn an allocation list into the root a contract checks and one proof per recipient. The list never leaves the tab.Your data stays in this tabGives you Merkle root, Proofs JSON, Solidity verifier, Summary
Merkle and Airdrop Builder is ready for input.
Hashed in this tab. The list of who gets paid never leaves the browser.On-chain bench
Free now1 min · 1 max0 selected · 0 BMerkle rootProofs JSONSolidity verifier
Step 1
Add your files
Paste from clipboard
Selected files
No files selected yet.
Add files to populate the queue. After that you can tune controls, run the job, and download outputs from the same panel.
Step 3
Run tool
Waiting for files and settings.
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Pick files and run the tool.
Notes
Leaves are sorted by hash, so the root depends on the set of allocations and not on the order of the rows. Two people with the same list get the same root.
The tree is the one @openzeppelin/merkle-tree builds, so a front end using StandardMerkleTree gets this root and these proofs.
Every proof is verified against the root before it is written out. If one did not verify, nothing would be.
Amounts are whole numbers in the smallest unit. A comma is read only between groups of three digits, so "1,000" is a thousand and "1,5" is refused rather than guessed.
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
1 file minimum and 1 file maximum. A CSV of addresses and amounts, with or without a header. Amounts are in the token's smallest unit.
The Run button stays disabled until the required input is ready.
Output
Merkle root, Proofs JSON, Solidity verifier, Summary. 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 forPublishing an airdrop or a whitelist, and wanting the root to be reproducible by anyone holding the same list.
Good to knowIt verifies every proof against the root before handing them over, and it checks each address against its own EIP-55 checksum. A mixed case address that fails that check has had a character changed since somebody wrote it down, and the tokens are about to go nowhere.
- Merkle
- Airdrop
- Whitelist
- EIP-55
- Offline
Where your data goesNowhere. The work happens in this tab.