Your private lens on ₿itcoin.
50+ modules for Bitcoin education, an interactive protocol simulator, and live data. No tracking, no ads, no accounts.
Zero footprint
No cookies. No analytics. No accounts. No server-side data. BitLens runs 100% in your browser — your financial data never leaves your device.
Bitcoin-only depth
No altcoin noise. 46 modules covering everything from 'What is Money' to multisig setup, on-chain analytics, and macro economics — all focused on Bitcoin.
Tools that work offline
Install as a PWA on any device. Education, calculators, and cached data are available even without internet. Live data syncs when you're back online.
Zero dependencies
No npm. No frameworks. No build step. Pure vanilla JavaScript, HTML, and CSS. Open source and auditable — exactly how Bitcoin software should be.
Start here
Four paths into BitLens, based on what you need right now.
Learn by Doing
Build Bitcoin hands-on: generate keys, mine blocks, sign transactions, and open Lightning channels. Track your progress and earn a verifiable SHA-256 proof.
📘New to Bitcoin?
Start with the fundamentals: what money is, why Bitcoin matters, and how to buy your first sats.
🛡️Protect your stack
Self-custody guides, seed phrase security, multisig setup, inheritance planning, and OpSec best practices.
📊Analyze & plan
Live on-chain data, DCA calculator, fee estimator, macro dashboards, and 6 chart models.
Why Bitcoin-only
Focus. Signal over noise. BitLens is built for people who want to understand and plan around the most robust, decentralized monetary network. No token shills. No distractions.
Why privacy-first
Bitcoin was born from the cypherpunk movement. Your learning, planning, and portfolio modeling should be private too. BitLens runs entirely in your browser — no analytics, no cookies, no server-side data collection. Not even an account. Your financial data stays yours. Read our privacy policy for full details.
All 46 modules
Education, research, tools, and live data — everything runs in your browser.
Learn
What is Money
History of money from barter to fiat, the gold standard, Bretton Woods, the Cantillon Effect, and why Bitcoin is the next evolution.
Why Bitcoin
18 foundational modules on scarcity, decentralization, and monetary properties.
How Bitcoin Works
UTXOs, transaction lifecycle, block anatomy, Nakamoto consensus, mempool mechanics, address types, P2P networking, and cryptographic primitives.
Buy Bitcoin
How to acquire bitcoin: exchanges, P2P, ATMs, and DCA strategies — no endorsements.
Self-custody guide
10-wallet comparison cards, advanced best practices, 12-item security checklist, and step-by-step key management.
Run a node
Pre-built node comparison (Umbrel, Start9, RaspiBlitz), pruned mode, Tor setup, and Electrum server guidance.
Mining
Stratum V2, home mining reality check, pool payout methods, halving impact, and economics explained.
Lightning Network
Lightning in 2026: BOLT12 Offers, splicing, async payments, trampoline routing, and Layer 2 fundamentals.
Seed Phrases
Visual explainer of BIP-39 mnemonic generation — from entropy to keys.
Multisig Setup Guide
Interactive signing simulator with configurable quorum and key-loss demonstration, MuSig2 comparison, SLIP-39 warning, and step-by-step setup.
Privacy & CoinJoin
Privacy in 2026: chain analysis, UTXO management, CoinJoin mechanics, 12 best practices, and legal context for privacy tools.
Inheritance & Estate Planning
Bitcoin inheritance strategies: multisig, timelocks, dead-man's switches, letter templates, legal frameworks, and collaborative custody services.
Security & OpSec
Threat landscape, social engineering, malware defense, physical security, exchange risks, network OpSec, and a 30-point security checklist.
Knowledge Quiz
145 questions across 14 categories with difficulty levels, score tracking, and detailed explanations.
Myths & Misconceptions
16 myths across 4 categories — including post-ETF, nation-state, and quantum computing myths — with filter chips and sourced rebuttals.
Think in Sats
Reframe Bitcoin in units everyone can afford. See everyday items priced in satoshis at live exchange rates.
Protocol Playground
Interactive 6-step Bitcoin protocol simulator: generate keys, mine blocks, build transactions, sign with ECDSA, adjust difficulty, and open Lightning channels — all client-side with real cryptography.
My Journey
Track progress across 37 modules, earn tiers from Newcoiner to Full Citadel, and generate a verifiable SHA-256 proof of your Bitcoin knowledge.
Research
Whitepaper
Read and navigate the Bitcoin whitepaper with multiple viewer options.
Bitcoin Thesis
Sound money deep dive with Gresham's Law, Austrian economics, updated macro data, game theory, network effects, adoption cascade, and key thinkers.
Timeline
67 historical Bitcoin events across 8 categories from 2008 to today.
Glossary
139 terms across 9 categories with filter chips, cross-references to every module, and inline tooltips across the app.
FAQ
27 questions across 5 categories — including post-ETF and regulation topics — with filter chips.
BIP Explorer
41 Bitcoin Improvement Proposals across 14 categories with importance notes, multi-category filtering, and external links.
Script Reference
Bitcoin Script opcodes and example scripts for understanding transaction logic.
Resources Library
32 curated books, podcasts, videos, courses, and open-source projects filtered by difficulty and type.
Tools
Scenario Engine
DCA projections with Bear/Base/Bull presets, custom CAGR, and CSV export.
BTC/Sats Converter
Instant conversions between BTC, satoshis, and fiat at live prices.
Address Validator
Client-side validation for Legacy, SegWit, and Taproot addresses.
Transaction Decoder
Parse raw transaction hex into human-readable inputs, outputs, and scripts.
Fee Estimator
Real-time fee recommendations, custom transaction cost calculator, and live mempool status.
DCA Backtest
Test how DCA strategies would have performed historically with customizable timeframes, amounts, and frequencies.
Data
Charts Dashboard
Price action, Stock-to-Flow, Rainbow Chart, Power Law, DCA Backtest, BTC vs. traditional assets, and Fear & Greed historical chart.
On-chain Metrics
11 sections: block height, fees, difficulty, mempool, hash rate, supply distribution, mining pools, UTXO stats, and Lightning data.
Halving Tracker
Live countdown with full halving history, cycle context, and price impact data.
Macro Dashboard
BTC overlaid with M2, CPI, Fed Funds, DXY, 10Y Treasury, Federal Debt, and gold price.
Node Network
Global Bitcoin node map with version distribution, service flags, and network types.
Block Explorer
Browse recent blocks and transactions with confirmation badges and decoded details.
Whale Alert
Live feed of large Bitcoin transactions (> 100 BTC) in the last 24 hours.
Tx Analytics
Transaction count, volume, and velocity charts tracking network activity over time.
Built in the open
BitLens is open source and shaped by community feedback. Follow development updates, report bugs, or suggest features.