Bitcoin Wallet by Coinb.in

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Take Control of Your Bitcoin with a Secure, Open-Source Wallet

In today’s fast-evolving digital economy, owning and managing your Bitcoin securely is more important than ever. With Coinb.in, you gain full control over your private keys and transactions—without relying on third parties. This lightweight, browser-based Bitcoin wallet empowers users to act as their own bank, offering advanced features like multisig support, SegWit address generation, time-locked transactions, and raw transaction signing—all executed directly in your browser.

Because Coinb.in runs entirely client-side using JavaScript, your private keys never leave your device. This ensures maximum privacy and security, making it one of the most decentralized wallet solutions available.

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Why Choose Coinb.in for Bitcoin Management?

Coinb.in stands out in the crowded crypto wallet space due to its transparency, open-source nature, and focus on user sovereignty. Unlike custodial wallets that hold your keys, Coinb.in ensures you remain the sole owner of your funds at all times.

Open Source & Transparent

Built under the permissive MIT license, Coinb.in is fully open source. You can inspect every line of code on GitHub, verify its integrity, or even host your own instance offline. This level of transparency builds trust and allows developers to contribute improvements or build upon the existing framework.

Full Private Key Control

No servers store your private keys. Every key pair is generated locally in your browser. This means:

Advanced Transaction Features

Coinb.in supports complex Bitcoin operations that most wallets don’t offer:

These tools are ideal for developers, power users, and anyone looking to leverage Bitcoin’s full scripting capabilities.

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Create Different Types of Bitcoin Addresses

Coinb.in allows you to generate various types of Bitcoin addresses based on your security and efficiency needs.

Standard Address (P2PKH)

The traditional Bitcoin address starting with "1". Suitable for basic sending and receiving.

SegWit (Bech32) Address

Addresses starting with "bc1" offer reduced transaction fees and improved network scalability. SegWit addresses separate signature data from transaction data, lowering overall size and cost.

Multisig Address

Enhance security by requiring multiple private keys to authorize a transaction. For example, a 2-of-3 multisig setup means two out of three designated parties must sign to spend funds—ideal for shared wallets or corporate treasuries.

Time-Locked Address (OP_HODL)

Use OP_CHECKLOCKTIMEVERIFY to create addresses where funds can't be spent until a specific date and time. Perfect for long-term savings plans or conditional payments.

Hierarchical Deterministic (HD) Address

Generate a master HD address following BIP32 standards. From one seed, derive multiple child addresses—simplifying wallet management while maintaining high security.

Important: Always manually back up any private keys or seed phrases. Losing them means losing access to your funds permanently.

Build and Broadcast Raw Transactions

For full control over your Bitcoin transactions, Coinb.in enables manual creation and broadcasting of raw transactions.

Step-by-Step Transaction Process

  1. Input Selection: Enter the transaction IDs and details of unspent outputs (UTXOs) you want to spend.
  2. Output Configuration: Specify recipient addresses and amounts.
  3. Fee Estimation: Use the built-in fee calculator to determine optimal network fees based on current congestion.
  4. Sign Locally: Sign the transaction within your browser—your private key never leaves your machine.
  5. Broadcast Securely: Push the signed transaction to the Bitcoin network via selected nodes.

This process gives you granular control over fees, speed, and security—especially useful during periods of high network activity.

Bitcoin Fee Calculator: Optimize Your Transaction Costs

Minimize fees without sacrificing confirmation speed using Coinb.in’s integrated fee estimator.

The tool analyzes recent block data to recommend the lowest viable fee (in satoshis per byte) for timely inclusion in upcoming blocks. It estimates transaction size based on input/output types:

You can adjust settings to balance cost versus urgency—sending small amounts during low-traffic periods or prioritizing fast confirmations when needed.

Verify and Sign Transactions with Confidence

Before broadcasting, always verify raw transactions to prevent errors or malicious manipulation.

Coinb.in lets you:

This extra layer of scrutiny protects against phishing attacks or tampered transaction data—common risks when dealing with hardware wallets or external signing tools.

Privacy-Focused Design

Privacy is core to Coinb.in’s philosophy:

These features make Coinb.in suitable for users who value anonymity and resistance to surveillance.

Developer-Friendly Tools & APIs

Developers can integrate Coinb.in’s functionalities into their own applications:

Even though official API documentation is still in development, the accessible codebase allows technical users to explore and extend its capabilities.

Frequently Asked Questions (FAQ)

Q: Is Coinb.in safe to use?
A: Yes, when used correctly. Since it's client-side only, your keys stay local. However, always ensure you're on the legitimate site and back up keys securely.

Q: Can I recover my coins if I lose my private key?
A: No. There is no recovery option—this is by design for security. Always store backups in multiple secure locations.

Q: Does Coinb.in work offline?
A: Yes! Download the source from GitHub and run it locally in your browser without internet access.

Q: What makes multisig wallets more secure?
A: They require multiple signatures to authorize spending, reducing the risk of theft from a single compromised key.

Q: How do time-locked addresses work?
A: Using Bitcoin’s OP_CHECKLOCKTIMEVERIFY, these addresses prevent spending until a predefined date, helping enforce long-term saving strategies.

Q: Why should I care about SegWit addresses?
A: They reduce transaction size and fees by up to 40%, while also improving network efficiency and future-proofing your holdings.

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Final Thoughts: Empowerment Through Decentralization

Coinb.in isn’t just a wallet—it’s a gateway to true financial self-sovereignty. By removing intermediaries and enabling powerful Bitcoin scripting features, it supports both everyday users and developers seeking deeper engagement with the blockchain.

Whether you're creating a secure multisig vault, setting up a time-locked savings plan, or simply managing your Bitcoin with full privacy, Coinb.in delivers flexibility, transparency, and trust—all without compromising on security.

Core Keywords: Bitcoin wallet, open source wallet, private key control, multisig Bitcoin, SegWit address, raw transaction, time-locked address, client-side crypto