
CryptoBoy
🥷 Your cryptography & cryptocurrency Swiss Army Knife
CryptoBoy launched on April 4, 2021 with 8 votes, #1,349 of 3,754 launches that month and more than 50% of that year's launches. The site was not reachable when checked in September 2026.
What it does
Initial beta release includes: - Base converter - BTC, ETH, DOT, KSM minor unit converters - ECC Keypair Generator + ECDH - Encoding / decoding into Base16, Base58, Base64 - QR Code Generator - Hashing algorithms (SHA, Keccak, RIPEMD, Blake, Groestl) - Favorites Manager - App Styling Settings
Does a similar job
all alternatives →
Rscrypto, pure-Rust crypto with industry leading public benchesJun 2026 · github.com · ▲33Rust crypto w/ zero default deps: BLAKE3, Ed25519/X25519, hashes, MACs, KDFs, AEADs, and checksums w/ full SIMD/ASM acceleration - GitHub - loadingalias/rscrypto: Rust crypto w/ zero default deps: BLAKE3, Ed25519/X25519, hashes, MACs, KDFs, AEADs, and checksums w/ full SIMD/ASM acceleration
Ellipticc Drive – open-source cloud drive with E2E and PQ encryptionOct 2025 · ellipticc.com · ▲21Hey HN, I’m Ilias, 19, from Paris. I built Ellipticc Drive, an open-source cloud drive with true end-to-end encryption and post-quantum security, designed to be Dropbox-like in UX but with zero access to your data, even by the host. What’s unique: Free 10GB for every user, forever. Open-source frontend (audit or self-host if you want) Tech stack: Frontend: Next.js Crypto: WebCrypto (hashing) + Noble (core primitives) Encryption: XChaCha20-Poly1305 (file chunks) Key wrapping: Kyber (ML-KEM768) Signing: Ed25519 + Dilithium2 (ML-DSA65) Key derivation: Argon2id → Master Key → encrypts all…
A beautiful crypto invoice generator2024 · cryptoinvoice.new · ▲11Make crypto-based invoices in minutes with preset templates. Create a web3 ready invoice you can send to your clients. Supporting Stablecoins and other EVM tokens.
Rain Hashes2023 · github.com · ▲18The fastest 128-bit and 256-bit hash, passes all tests, and under 140 source lines of code. API library and CLI tool in C++ and NodeJS/Wasm - DOSAYGO-STUDIO/rain

Custom Secret SeedPhrase Generator 12-242025 · cryptovurny.com · ▲12The First And Only Customizable Crypto Wallet Generator
More dev tools this month
the category →
Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.
Dev tools · 1d ago · github.com


open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 29d ago · github.com

Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 27d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 24d ago · openbot.run
Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 22d ago · talanoa.email
Source: Product Hunt launch ↗
Launched alongside, April 2021
the whole month →




Build your landing page with these 100+ tools
Growth · 2021 · landingpage.fyi
- PFPDFs from HTML▲742
Life & fun · 2021 · pdf.math.dev