In the rapidly evolving Web3 landscape, “observability” has become a core capability of blockchain infrastructure. Whether you’re a developer, validator, or everyday investor, you rely on block explorers to view on-chain transactions, track asset holdings, and analyze network status. Building a Solana Explorer clone isn’t just a technical challenge—it’s one of the best ways to truly understand Solana’s underlying architecture.

This article, based on the latest development environment in 2025, will walk you through how to build a Solana Explorer Clone from scratch, aiming to match the official Solana tools in terms of visuals, performance, and user experience.

1. Why Build a Solana Explorer Clone?

As the Solana ecosystem continues to expand and its average TPS consistently exceeds 2,000, explorer tools have shifted from simple “feature queries” to deeper “data insights.” Building a custom Solana Explorer offers several advantages:

• More flexible on-chain data presentation
  Enjoy greater freedom in UI design and data aggregation compared to the official explorer.
• Tailored to specific business needs
  For example, NFT projects can enhance mint tracking, MEV analysis, or visualize program call paths.
• Strengthen your team’s Web3 expertise
  Starting with explorer architecture is the best way to understand RPC, blocks, transactions, and account models.

2. Core Architecture: Essential Features for a Solana Explorer

A fully functional Solana Explorer should include these core components:

1. RPC Node Connection

At its foundation, an explorer reads blockchain data, so it must interact with Solana RPC services such as:

• getTransaction
• getBlock
• getAccountInfo
• getSignaturesForAddress
• getProgramAccounts

Common solutions:

• Official Solana RPC
• Helius (high-performance RPC + webhooks)
• Triton (focused on indexing)
• Self-hosted RPC nodes

2. Data Indexing (Indexing Layer)

Solana is a high-throughput chain, and relying solely on RPC can create bottlenecks. You’ll need:

• Backend database (PostgreSQL / ClickHouse)
• Block scanner
• Indexing programs and account data
• Incremental updates (tracking new blocks)

3. Backend API Service

Build a unified API layer to provide structured data for the frontend:

• /api/transaction/:signature
• /api/address/:address
• /api/block/:slot
• /api/token/:mint

Popular frameworks:

• Node.js + Express
• Rust + Axum
• Go + Gin

4. Frontend Interface (Explorer UI)

The core value of an explorer is clear presentation. Recommended tech stack:

• Next.js 15 (App Router + React Server Components)
• Tailwind CSS
• Chart.js or Recharts

Main UI pages:

• Transaction detail page
• Address asset page
• Block list
• Token information page
• Program execution trace page (optional)

3. Step-by-Step: Building Your Solana Explorer Clone

Let’s break down the key steps so developers can get hands-on right away.

Step 1: Initialize the Project

npx create-next-app solana-explorer-clone

Install the Solana Web3 SDK:

npm install @solana/web3.js

Step 2: Connect to Solana RPC

Example (fetch latest block height):

import { Connection, clusterApiUrl } from “@solana/web3.js”;

const connection = new Connection(clusterApiUrl(“mainnet-beta”));

export async function getLatestBlock() {

return await connection.getSlot();

}

Step 3: Build Block and Transaction Query APIs

Backend example (Next.js /api/block/[slot]):

import { Connection } from “@solana/web3.js”;

const rpc = new Connection(“https://api.mainnet-beta.solana.com“);

export default async function handler(req, res) {

const { slot } = req.query;

const block = await rpc.getBlock(parseInt(slot));

res.json(block);

}

Step 4: Set Up the Database Indexer (Indexing Layer)

Synchronize new blocks every second, storing block, transaction, and account data in your database.

You can:

• Write a block scanner (polling)
• Use webhooks (Helius)
• Use Kafka for block queue processing

Example pseudocode:

while True:

latest_block = rpc.get_block(current_slot)

db.insert(latest_block)

current_slot += 1

Step 5: Build the UI (React + Next.js)

Sample transaction detail page:

export default function TransactionPage({ data }) {

return (