Immuta — Don't trust us. Trust the code.

Try it free — no wallet needed

See your file fingerprint instantly

Drop any file below. Your SHA-256 fingerprint is computed locally — the file never leaves your device.

📄

Click to select a file

document, photo, video, zip — anything · file never leaves your device

How it works

Three steps. Permanent proof.

No account required. No server. Your file never leaves your browser.

Drop any file or paste text

Immuta computes a SHA-256 fingerprint in your browser. A document, photo, video, zip — anything. The original never leaves your device.

Pay $1 and seal

Pay $1 in eUSDC, eDAI, or eUSDT — PulseChain wrapped stables. Sign with your wallet. Your fingerprint, timestamp, and note are written permanently to PulseChain.

Share your certificate

Get a shareable verification URL and downloadable PDF. Anyone can verify your seal on PulseScan independently — no Immuta account needed.

Don't trust us — verify it yourself

How to verify a seal on the blockchain

Every Immuta seal is a public transaction on PulseChain. You don't need Immuta to verify it — just the block explorer.

Copy your transaction hash

After sealing, Immuta shows your TX hash. Copy it — or find it later in the Audit Log tab.

Open PulseScan

Go to scan.pulsechain.com and paste your TX hash in the search bar.

Click "View details"

Under the transaction, click View details to expand the decoded input data. You'll see the exact storeHash call with your document's SHA-256 hash, label, note, and the token used — all written permanently to the blockchain.

Verify the hash matches

Run shasum -a 256 yourfile on any computer and compare the output to the hash on-chain. If they match, the file hasn't been altered since it was sealed.

No Immuta required. The smart contract is verified and open source. Anyone with a block explorer can independently confirm that your content existed at the recorded time — even if Immuta disappears tomorrow.

Contract

Verify the contract yourself

Copy the address below and paste it into any block explorer. Or read the source on GitHub.

0x0C2a0F6289D1Af62fc2C90301f8a0CadcD017e5c

PulseChain Mainnet · Chain ID 369
View on PulseScan → · Source on GitHub →

Use cases

If you've ever needed to prove something happened

This is for you.

The freelancer

You delivered the work. The client says they never approved it. You sealed the approved version the day they signed off. The argument is over. Seal a contract →

The journalist

Seal source documents the moment you receive them. Prove they existed before your story broke — before any denial, before any legal challenge. Seal a source document →

The creator

You wrote it, photographed it, composed it first. Seal your original work before publishing. Prove authorship before anyone else can claim it. Seal your original work →

The tenant

Move-in day. Photograph every scratch, every mark. Seal the photos. When they try to keep your deposit — you have irrefutable proof of condition. Seal move-in photos →

In the age of AI and disinformation —

Immuta it. Before they change it.

Questions

The things people ask first

Honest answers. No marketing.

Is an Immuta seal legally binding?+

A seal proves that the exact content of a file existed at a specific time on a public, immutable ledger. Cryptographic timestamps have been accepted as supporting evidence in many jurisdictions, but we're not lawyers and Immuta is not a substitute for one. Whether a particular court or contract accepts a blockchain timestamp depends on your jurisdiction and the specific matter. For anything with legal stakes, consult an attorney.

What happens if Immuta shuts down?+

Nothing happens to your seals. They live on PulseChain, not on our server. Any block explorer — scan.pulsechain.com, pulsescanner.io, or any node you run yourself — can verify your seal forever. The frontend is a convenience. The protocol is the product.

How is this different from emailing a file to myself?+

Email timestamps come from mail servers — centralized systems that can be edited, lost, or disputed. Headers can be forged; providers can delete mailboxes; jurisdictions can subpoena them. A PulseChain seal is a public transaction verified by hundreds of independent nodes worldwide. No one can alter it, delete it, or hide it — not you, not us, not a government.

Can anyone see what I sealed?+

No. Your file never leaves your device. Only the SHA-256 hash — a one-way 64-character fingerprint — is written to the blockchain, alongside your label, optional note, and wallet address. A hash cannot be reversed to reconstruct the file. Anyone with the original file can verify it matches the hash, but no one can figure out what the file was from the hash alone.

Why does it cost $1? Why not free?+

Someone has to pay for the blockchain transaction. The $1 fee covers PulseChain gas and keeps the protocol sustainable without ads, tracking, analytics, or a token we'd ever have to promote. The smart contract hardcodes a maximum fee of $10 — we cannot raise the price without redeploying an entirely new contract. The code is public. Verify it yourself.

What if I want belt-and-suspenders proof?+

If the long-term survival of any single chain concerns you, seal the same file on multiple networks. Because SHA-256 is deterministic, the fingerprint is identical everywhere — the same hash on PulseChain, Bitcoin, or Ethereum all point to the exact same file. Redundancy is cheap when the unit of proof is one dollar.

Pricing

One dollar for freedom

No subscriptions. No tiers. No surprises.

Per seal

eUSDC · eDAI · eUSDT · PulseChain wrapped stables

One dollar for freedom.

Permanent on-chain record

Shareable verification URL

Downloadable PDF certificate

Wallet audit log entry

Zero data collected

PulseChain gas included

Seal your first document →

One flat fee. No subscriptions. No hidden charges.

What you get

A professional certificate

Every seal generates a downloadable PDF certificate with a QR code for instant verification.

↓ Our first seal — Immuta's own source code

Immuta Protocol · PulseChain Network

Certificate of Document Seal

Blockchain Attestation Record

Label

Immuta Protocol — Source Code v1.0 — April 2026

Sealed

4/16/2026, 1:17:43 PM

Network

PulseChain Mainnet · Chain ID 369

Transaction

0x71b8ef162f42551cad57e4eaf5f2c1c1ad8781336d760ed59a2e42502923017c ↗

Sealed by

0xfeD3b557EFbB592c1634e8C597170f6733c3A905 ↗

Note

Original source code for Immuta document sealing protocol. Smart contract deployed on PulseChain mainnet.

SHA-256 Fingerprint

0x592377391903857cdb47f5041c1992aba7d62c8f9100dfc715bb83aac16a450d

Independently verifiable at scan.pulsechain.com · immuta.app

Scan to verify

✓ Verified on-chain

Verify this seal on PulseScanner →

Get started

Add PulseChain to your wallet

You need MetaMask and PulseChain configured to use Immuta. Here's how.

Install a wallet

PulseChain works with Internet Money, MetaMask, and Brave Wallet. Any of these will work with Immuta.

Add PulseChain network

Visit pulsechain.com and scroll down to find the "Add PulseChain to MetaMask" button. One click adds the network automatically.

Get PLS for gas ⚠️

Every PulseChain transaction needs a tiny amount of PLS for gas — like ETH on Ethereum. Without it nothing will work. You only need a few cents worth.

Easiest: Liberty Swap gasless mode
libertyswap.finance lets you swap from any chain (ETH, BNB, Base, Arbitrum, Solana) directly to PLS or stablecoins on PulseChain. Enable the Gasless toggle and Liberty Swap covers your gas — no PLS needed to get started. No KYC. Non-custodial.

You only need a few cents worth of PLS per seal transaction.

Get eUSDC, eDAI, or eUSDT

PulseChain uses wrapped stables — not native USDC/USDT/DAI. You need $1 worth to seal. Three ways to get them:

· Liberty Swap — swap from any chain directly to PulseChain stables. Enable gasless mode.
· PulseX — trade PLS or any PulseChain token for eUSDC, eDAI, or eUSDT.
· PulseChain Bridge — bridge your existing USDC/USDT/DAI from Ethereum.

Contract addresses for verification:
eUSDC · 0x15D38573d2feeb82e7ad5187aB8c1D52810B1f07
eUSDT · 0x0Cb6F5a34ad42ec934882A05265A7d5F59b51A2f
eDAI · 0xefD766cCb38EaF1dfd701853BFCe31359239F305

⛽

The most common mistake: People bridge their stablecoins successfully but then can't do anything because they have no PLS for gas. Use Liberty Swap's gasless mode to avoid this entirely — it handles gas automatically so you can arrive on PulseChain ready to seal straight away.

Need help getting set up? Two great resources:

pulsechain.com — scroll down to add PulseChain to MetaMask in one click.
pulsechainstats.com/getting-started — step by step beginner guide to wallets, bridging, and getting started on PulseChain.
gibs.finance — onboarding and bridging to PulseChain, ideal if you're moving funds from another chain.

Network name: PulseChain · Chain ID: 369 · RPC: https://rpc.pulsechain.com · Explorer: scan.pulsechain.com

Manifesto

They told you to trust the institution.
To trust the notary. The bank. The registry. The middleman.
To trust the paper. The stamp. The signature of someone you've never met.

The future doesn't ask for trust. It demands proof.

Immuta is built on the belief that truth should be mathematical, permanence should be absolute, and verification should require no authority — only a blockchain. That the integrity of a record should not depend on the integrity of any single institution.

We build on PulseChain because decentralized infrastructure should be fast enough, and affordable enough, to be genuinely useful — not a privilege reserved for those who can absorb the cost.

We hold no data. We keep no files. We collect no information beyond what the blockchain itself records — your hash, your label, your wallet address. That's it. Nothing else exists.

The $1 sealing fee is enforced by the smart contract — not by us. This is a security feature: the contract code limits the fee to a maximum of $10, protecting you from future price changes. We cannot raise the price without redeploying an entirely new contract. The code is public. Verify it yourself.

Trustless

Immutable

Permanent

Obey the code.

Signed on behalf of

— The Human Race

Transparency

We hold nothing.

No name. No email. No IP address. No analytics. No account. The only information that exists on-chain is what you chose to put there.

Stays on your device

The original file or text. Never transmitted. Never stored. Never seen by us.

Goes on-chain

Your SHA-256 hash, timestamp, wallet address, label, and optional note.

Anyone can see

The on-chain record and verification link. PulseChain is a public blockchain.

There is nothing to subpoena. Nothing to breach.
The code holds the record. Not us.

Our commitment

No token. No sacrifice. Ever.

Immuta will never launch a token, run a sacrifice, or sell you anything beyond the $1 sealing fee. The tool exists to serve the protocol — not the other way around.

Seal anything.Permanently. On-chain.

Seal anything.
Permanently. On-chain.