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20 offline Web3 tools for EVM (ABI, calldata, EIP-712, Merkle proofs), Solana (Anchor IDL, lamports), and Cosmos (Bech32, IBC denom). Plus 110+ browser-based utilities for JSON, CSV, YAML, XML, encoding, hashing, and image processing. No sign-up. No data leaves your device.
The complete catalog by category — search by name, tag, or use case.
Decode and encode Solidity function call data against any ABI. Tuples, arrays, and custom types — no RPC needed.
Open ABI DecoderPaste transaction input data and read function name, parameters, and argument types without connecting a wallet.
Open Calldata DecoderBuild a Merkle tree from an address/amount list and generate the root plus inclusion proofs for each leaf.
Open Merkle ToolPretty-print, minify, and validate JSON instantly. Tree view, line numbers, and error highlighting in your browser.
Open FormatterCompute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes. File support included, all client-side.
Open Hash ToolInspect JSON Web Tokens — header, payload, and signature. Verify expiry and claims without sending the token anywhere.
Open JWT Decoder110+ tools run 100% in your browser. Your input data — JSON payloads, secrets, addresses — never leaves your device.
EVM, Solana, Cosmos tools for ABI decoding, Merkle proofs, Anchor IDL, Bech32 — all offline, all client-side.
Every utility works immediately on first visit. No accounts, no API keys, no usage limits.
JSON, CSV, YAML, XML, Markdown — with bidirectional conversion and code generation for TypeScript, Go, Python, Java, C#, SQL.
Search or browse the catalog of 110+ tools — from the sidebar, the Popular list, or the All Tools page.
Drop your data into the editor. Every tool processes it entirely in your browser — nothing is uploaded.
Format, convert, or generate instantly. Copy to clipboard, download as a file, or keep iterating.
These are the utilities most BeautiCode visitors open every day. The list covers the everyday developer loop: inspect an API response, hash a password, tidy up a config file, generate a throwaway UUID, or convert between formats before shipping. Click any chip to jump straight in. Nothing requires sign-up.
EVM, Solana, and Cosmos primitives that ship in production smart-contract workflows.
Format, validate, and convert the payloads you paste from APIs, logs, or spreadsheets.
Hash, sign, and check values before they leave your machine — every tool runs in your browser.
Unit, time, and style conversions for frontend work and design handoffs.
Throwaway IDs, QR codes, and stand-in values for demos, seeding, or test fixtures.
A complete guide to HTML head meta, Open Graph, Twitter Cards, and Schema.org JSON-LD. Build rich social previews and earn rich result eligibility on search engines.
A practical guide to Solana lamport math. 1 SOL = 10^9 lamports, BigInt pitfalls in JavaScript, Rust u64 patterns, fee and rent calculation, address validation.
A backend developer guide to public key cryptography. Compares RSA and Ed25519 for SSH, JWT, Git commits, and blockchain — speed, key sizes, FIPS, post-quantum.
Yes. All developer utilities are unlimited and work without a sign-up — no credit card, no account, no payment ever.
No. Every formatter, converter, validator, and generator runs entirely in your browser using JavaScript. You can verify by watching the Network tab during any conversion — nothing is transmitted to a server.
Data formats include JSON, CSV, YAML, XML, and Markdown with bidirectional conversion. Code generation supports TypeScript, Go, Python, Java, C#, and SQL. Web3 coverage spans EVM (Ethereum, Polygon, Base, BSC, Kaia), Solana, Cosmos SDK chains, and Bitcoin.
Yes — the ABI decoder, calldata decoder, EIP-712 builder, Merkle tree generator, and address validators run client-side and never need an RPC endpoint or private key. They handle real mainnet payloads.
Each tool is purpose-built for a specific developer workflow — JSON Formatter is optimized for pretty-printing and validation, while JSON to TypeScript focuses on type generation. The tools share a unified UI but each one has its own logic and footer documentation.
The developer toolkit that respects your privacy
BeautiCode is a browser-based toolbox for everyday developer tasks: formatting and validating data (JSON, CSV, XML, YAML), generating type-safe code (TypeScript, Go, Python, Java, C#, SQL, Markdown), computing cryptographic primitives (Hash, AES, Bcrypt, HMAC, JWT), creating throwaway identifiers (UUID, QR, password), and decoding Web3 payloads (ABI, calldata, EIP-712, Anchor IDL, Bech32) — all from a single workspace.
Privacy-first by design. Every converter, formatter, and generator runs in your browser with JavaScript — input data is never uploaded. You can confirm this by watching the Network tab during a conversion. Details are in the Privacy Policy.
Free to use. All tools work immediately, without registration or usage limits. Non-intrusive advertising keeps the service running for everyone.
Typical tasks: format a JSON API response, generate a secure password, decode a JWT token, create a QR code for a business card, decode Ethereum transaction calldata, or convert colors for a design project. BeautiCode keeps the UI consistent across tools so you rarely need to re-learn a workflow.
110+ tools include formatters, converters, validators, and generators that run entirely in your browser — input never leaves your device.
20 dedicated tools for Ethereum, Solana, and Cosmos workflows — ABI decoding, Merkle proofs, EIP-712, Anchor IDL, Bech32, and more.
Color, image, and CSS tooling sits next to data utilities — convert HEX/RGB/HSL, optimize SVG, generate palettes and favicons.
Unlimited use, no sign-up. Advertising keeps the lights on; the tools themselves never paywall.