One-time purchase · Instant download

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Know what you own. Keep it to yourself. Airtight is a privacy-first crypto portfolio tracker that runs entirely in your browser. Your trades, your balances, your profit-and-loss — it all stays on your device. No cloud accounts. No analytics. No telemetry. Just you and your numbers.

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Why Airtight? Most portfolio trackers want you to create an account, sync your exchange via API, and trust them with your financial data. Airtight doesn't. It's a single HTML file. You open it locally, import your trades, and get a professional-grade portfolio dashboard — without ever sending a byte of your data anywhere.

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What it does

- Multi-exchange import — drop in CSVs from 70+ exchanges and wallets. Coinbase, Binance, Kraken, Hyperliquid, Revolut, Ledger — they all work.

- 850+ live prices, Option to add your own Coingecko API for optimal crypto prices coverage.

- FIFO cost basis — realized and unrealized P&L calculated properly, not guessed.

- Portfolio analytics — composition breakdown, category allocation, holdings table with every position.

- AES-GCM encryption — optionally password-protect your data at rest. Even if someone gets your laptop, they can't read your portfolio.

- Manual entry + PDF import — not everything comes as a clean CSV. Add holdings manually or extract trades from PDF statements.

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How it works

1. Buy — instant download of airtight.html (1.3 MB)

2. Open — double-click. Works in any modern browser. No install, no signup, no cloud.

3. Import — drag in your exchange CSVs or add trades manually

4. Track — live prices, P&L, charts. All local.

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Built for people who care about privacy

- No telemetry, no tracking, no external requests (except the price feeds you opt into)

- Your data never leaves your browser

- No account creation, no email collection, no "onboarding flow"

- Open the file, inspect the source — it's all there

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What's included

- airtight.html — the full application

- Readme.txt

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Requirements

- A modern web browser (Chrome, Firefox, Safari, Edge, Brave)

- That's it

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Pay with BTC/ETH/SOL or USDT / USDC on the network of your choosing and get our launch discount of 20$ instantly. After purchase, you'll receive the same instant download. No KYC, no email required — just a wallet address and the file is yours.

Try Airtight For Free

Not ready to buy? Start with Airtight Free Demo — the same local-first tracker, just with manual entry and a 50-transaction limit.

- Add up to 50 transactions manually

- Live prices, FIFO P&L, charts, holdings — everything the paid version has

- AES-GCM encryption included

- Same zero-cloud, zero-telemetry guarantee

- Instant download, no signup, no email

Limits: Manual entry only (no CSV/Excel import). 50 transactions max. Upgrade anytime — your data stays yours. Download Airtight Free ↓

Upgrade to the full version for unlimited transactions and CSV/Excel import from 70+ exchanges.

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One-time purchase · Instant download

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Know what you own. Keep it to yourself. Airtight is a privacy-first crypto portfolio tracker that runs entirely in your browser. Your trades, your balances, your profit-and-loss — it all stays on your device. No cloud accounts. No analytics. No telemetry. Just