Web3 Tools
Focused Ethereum address and unit utilities with source-backed Web3 guides.
Focused Ethereum utilities
This page keeps Web3 intentionally narrow: Ethereum address checksums and unit conversion. The scope is practical enough to be useful without presenting the site as a broad multi-chain tool directory.
Workflow focus
- Use Ethereum Address Checksum to convert and validate EIP-55 mixed-case addresses.
- Use Wei / Gwei / Ether Converter when gas fees, balances, or contract values need exact unit conversion.
- Use Crypto Unit Converter for ETH, Wei, Gwei, BTC, and Satoshi conversions in documentation and QA workflows.
- Read the related Ethereum guide to connect these tools to source-backed blockchain context.
Use case first
Each hub starts with the artifact you already have — payload, file, token, signature, address, or unit value — then points to the smallest useful tool.
Browser-side processing
The highlighted tools are designed for local inspection. Use test data or redacted samples when the value is a secret, token, private key, or customer record.
Guide connection
Related articles explain standards, edge cases, and common mistakes before you rely on a transformation in production.
Featured tools
Focused Ethereum utilities for EIP-55 checksums and Wei, Gwei, Ether, BTC, and Satoshi unit conversion with local browser processing.
Tools in this workflow
3 toolsEthereum Address Checksum
Convert Ethereum addresses to EIP-55 checksum format and validate address integrity.
Developer toolWei / Gwei / Ether Converter
Convert between Wei, Gwei, and Ether with precision. Decimal math without floating-point errors.
Developer toolCrypto Unit Converter
Convert between ETH, Wei, Gwei, BTC, and Satoshi units with precise calculations.
How to choose
Start with the data or artifact you already have, then pick the tool that performs the smallest useful transformation. Formatter and validator pages are best for inspection; converter pages are best when you need a new output format; security utilities are best for local verification and debugging.
Safety notes
Featured tools run in the browser, but sensitive values still deserve care. Use redacted samples in screenshots and support requests, avoid sharing API secrets or private keys, and check the related guide before relying on a result in production.
Documentation checklist
A useful developer tool page should explain the input format, the output format, common mistakes, privacy handling, and when another tool is a better fit. The featured tools on this hub are selected because they can be documented clearly against those checks.
If a workflow needs a broader catalog, start from Browse All Tools. If you need the reasoning behind a format or security choice, start from the Guide Index.
Related guides
Ethereum for Developers: Addresses, Checksums, and Key Concepts
Everything you need to start shipping on Ethereum: EIP-55 address checksums, wei-to-ether math, gas mechanics, wallet derivation, and the Hardhat vs Foundry split.
HMAC vs Signatures: API and Webhook Security Guide
Stripe webhooks use HMAC, OIDC ID tokens use RSA, JWTs ship in both flavours. The choice is rarely about cryptography — it is about who needs to hold the key and when.
Frequently asked questions
Why does this page show a small Web3 set?
The public Web3 surface keeps the workflow focused on practical Ethereum address and unit tasks. This avoids a broad multi-chain catalog while still giving the Web3 hub enough real utility.
Do the Ethereum tools connect to a wallet or RPC?
No. Address checksums and unit conversions are local browser calculations. They do not require a wallet connection, private key, RPC endpoint, or account.
Why not include every blockchain format here?
A narrow Ethereum-focused set is easier to verify, easier to document, and less likely to send users into unrelated multi-chain workflows.