Dev tools · alternatives · 2026

24 alternatives to LeVarInt64 for Rust

A library for encoding (and decoding) u64s into usually fewer than eight bytes.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. LeVarInt64 for Rust launched in 2023; newer entries below may have overtaken it.

1
High-speed UTF-8 validation in Rust▲127
SIMD-accelerated UTF-8 validation for Rust. Contribute to rusticstuff/simdutf8 development by creating an account on GitHub.
2021 · github.com · its alternatives →
2
ut – Rust based CLI utilities for devs and IT▲170
Hey HN, I find myself reaching for tools like it-tools.tech or other random sites every now and then during development or debugging. So, I built a toolkit with a sane and simple CLI interface for most of those tools. For the curious and lazy, at the moment, ut has tools for, - Encoding: base64 (encode, decode), url (encode, decode) - Hashing: md5, sha1, sha224, sha256, sha384, sha512 - Data Generation: uuid (v1, v3, v4, v5), token, lorem, random - Text Processing: case (lower, upper, camel, title, constant, header, sentence, snake), pretty-print, diff - Development Tools: calc, json…
2025 · github.com · its alternatives →
3
val – An arbitrary precision calculator language▲34
Wrote this to learn more about the `chumsky` parser combinator library, rustyline, and the `ariadne` error reporting crate. Such a nice DX combo for writing new languages. Still a work in progress, but I thought I'd share :)
2025 · github.com · its alternatives →
4
Write generative fine art in Rust▲306
2020 · paytonturnage.gitbook.io · its alternatives →
5
SIMD Viterbi Decoder in Rust▲64
I wrote libcorrect in C in 2016 and wanted to revisit it in Rust. Instead of doing just a direct conversion, I went down the rabbit hole of making Rust's std::simd work for me. I ended up with a templated, generic Viterbi decoder for convolutional codes that dispatches the decode at runtime depending on which instruction sets are available. For small rates and orders, the entire decode lives in registers. Larger codes work through memory but take advantage of some acceleration structures. I also spent some time building a tool to find optimal (max d_free) conv codes for a given rate and…
Aug 2026 · github.com · its alternatives →
6
Go library for concise, unambiguous and URL-safe UUIDs▲50
A generator library for concise, unambiguous and URL-safe UUIDs - lithammer/shortuuid
2015 · github.com · its alternatives →
7
A Fast, Malloc-Free C++14 Json Parser and Encoder▲98
Meta programming utilities for C++14. Merged in matt-42/lithium - matt-42/iod
2014 · github.com · its alternatives →
8
Rust Vector and Quaternion Lib▲128
I use this library I made for Vectors and Quaternions in many personal projects. I've open-sourced it, in case anyone else would get use out of it. I use this on various projects, including quadcopter firmware, a graphics engine, a cosmology simulation, and several molecular dynamics applications. No_std compatible.
2025 · github.com · its alternatives →
9
A first project in Rust – in-memory order book▲91
Contribute to connorwstein/exchange development by creating an account on GitHub.
2020 · github.com · its alternatives →
10
TurboQuant for vector search – 2-4 bit compression▲89
A vector index built on TurboQuant, written in Rust with Python bindings - RyanCodrai/turbovec
Mar 2026 · github.com · its alternatives →
11
Rust framework for advanced file recognition and identification▲46
Alternative to magic.h and infer. Zero dependencies. Fully extensible. Works in no_std, async, and embedded contexts.
2025 · crates.io · its alternatives →
12
Outperforming VByte for Large Integers Using Phi-Encoding▲15
Properties of a Novel Binary Representation of Integers using Base-𝜙 - irradix/paper.md at main · DOSAYGO-STUDIO/irradix
2024 · github.com · its alternatives →
13
A (marginally) useful x86-64 ELF executable in 466 bytes▲85
Battery info program for x86-64 Linux laptops in 307 bytes of machine code - meribold/btry
2024 · github.com · its alternatives →
14
"crzy64", base64 mod aimed for fastest decoding▲47
An easy to decode base64 modification. Contribute to ilyakurdyukov/crzy64 development by creating an account on GitHub.
2021 · github.com · its alternatives →
15
18KB ls alternative in no_std rust and Libc▲23
crates.io serves as a central registry for sharing crates, which are packages or libraries written in Rust that you can use to enhance your projects
Jul 2026 · crates.io · its alternatives →
16
A formally verified native Delta Lake implementation in Rust▲8
A native Rust library for Delta Lake, with bindings into Python - delta-io/delta-rs
2022 · github.com · its alternatives →
17
Using SIMD to decode and encode gigabytes of varints per second in Rust▲6
Decoding and encoding gigabytes of LEB128 variable-length integers per second in Rust with SIMD - as-com/varint-simd
2021 · github.com · its alternatives →
18
Realsense-Rust – Streaming Intel RealSense from Rust▲9
High-level RealSense library in Rust
2021 · gitlab.com · its alternatives →
19
Victor, a browser-optimized vector database written in Rust▲27
Hey HN, My friend Sam and I were bored one weekend, and wanted to make something self-contained but still useful. We ended up with Victor [0], a vector database designed to run in the browser. It’s written in Rust, which gives us access to things like super-fast and compact serialization and deserialization, but it’s compiled to WASM and uses web-sys to interact with the browser’s JS APIs to write the database contents to disk. We worked hard on designing it in a way that makes sense for the browser. It uses the private origin file system [1] and stores the vectors in a compact format (one…
2023 · github.com · its alternatives →
20
rtoml – a TOML library for Python written in rust▲5
A fast TOML library for python implemented in rust. - samuelcolvin/rtoml
2020 · github.com · its alternatives →
21
SPF Deconstructor in Rust▲26
This is rust library for deconstructing SPF DNS records. Written ha a project to learn some of the basics of rust.
2023 · github.com · its alternatives →
22
Edky, a CLI to convert Ed25519 public keys from one encoding to another▲7
Everything increasingly runs on Ed25519 keypairs, but Ed25519 public keys can be encoded as text in dozens of surface-incompatible different ways: hexadecimal, Base64 (OpenSSH), Base32z (iroh, pkdns), Base58 (NEAR), and Multibase (IPFS, libp2p), just for starters. Edky is a command-line tool and Rust library that converts between these Ed25519 surface encodings, aiding use of the same underlying keypair across e.g. an iroh endpoint, a libp2p peer, or a NEAR Protocol account. (Surprisingly, a conversion utility like this didn't yet exist!) $ cargo binstall -y edky $ edky convert -f iroh -t…
Jul 2026 · github.com · its alternatives →
23
Rust 1.0▲6
A high-level, safe and concurrent alternative to C++
2015 · rust-lang.org · its alternatives →
24
Cute tricks for SIMD vectorized binary encoding of nucleotides in Rust▲5
Cute tricks for SIMD vectorized binary encoding and decoding of nucleotides, in Rust. - Daniel-Liu-c0deb0t/cute-nucleotides
2020 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →