Dev tools · alternatives · 2026
24 alternatives to fastjson - Fast JSON Parsing for Go
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection - valyala/fastjson
fastjson is a Go library that provides fast JSON parsing capabilities. It is designed for developers who need to process JSON data efficiently in Go applications. The library emphasizes performance optimization for… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. fastjson - Fast JSON Parsing for Go launched in 2018; newer entries below may have overtaken it.
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Fast JSON encoder/decoder compatible with encoding/json for Go - goccy/go-json
2021 · github.com · its alternatives →
- 2
2014 · journal.paul.querna.org · its alternatives →
- 3
high performance JSON encoder/decoder with stream API for Golang - GitHub - francoispqt/gojay: high performance JSON encoder/decoder with stream API for Golang
2018 · github.com · its alternatives →
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Hello HN! I want to introduce fastgron, my new project. fastgron is a JSON to GRON converter, built to be incredibly fast – it's 40 times faster than Gron. GRON is a tool for making JSON greppable, but it can slow down with larger files. With fastgron, even a 200MB JSON file can be converted in just 1 second. Key features include streaming conversion for memory efficiency and an optimized path reconstruction for faster operations. It leverages C++ and the simdjson and fast_io libraries for speed. I welcome all feedback, suggestions, or questions. Thank you!
2023 · github.com · its alternatives →
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Easy-to-use JSON Library for Go. Contribute to antonholmquist/jason development by creating an account on GitHub.
2014 · github.com · its alternatives →
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Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy - ijl/orjson
2018 · github.com · its alternatives →
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THE fastest alternative JSON parser for Go that does not require schema - buger/jsonparser
Jul 2026 · github.com · its alternatives →
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Meta programming utilities for C++14. Merged in matt-42/lithium - matt-42/iod
2014 · github.com · its alternatives →
- 9
high performance JSON encoder/decoder with stream API for Golang - GitHub - francoispqt/gojay: high performance JSON encoder/decoder with stream API for Golang
2018 · github.com · its alternatives →
- 10
2015 · github.com · its alternatives →
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Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js
2014 · github.com · its alternatives →
- 12
Easy JSON Query Processor with a Lispy syntax in Go - cube2222/jql
2020 · github.com · its alternatives →
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A few months ago, I benchmarked FastAPI on an i9 MacBook Pro. I couldn't believe my eyes. A primary REST endpoint to `sum` two integers took 6 milliseconds to evaluate. It is okay if you are targeting a server in another city, but it should be less when your client and server apps are running on the same machine. FastAPI would have bottleneck-ed the inference of our lightweight UForm neural networks recently trending on HN under the title "Beating OpenAI CLIP with 100x less data and compute". (Thank you all for the kind words!) So I wrote another library. It has been a while since I have…
2023 · github.com · its alternatives →
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First time ever working on something like this, check it out
2024 · github.com · its alternatives →
- 15
Fast, direct and static typed parsing of JSON with C++ - netheril96/StaticJSON
2016 · github.com · its alternatives →
- 16
Provides a Kotlin/Java library to create a random json string - mangatmodi/RandomJson
2019 · github.com · its alternatives →
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Set JSON values very quickly in Go. Contribute to tidwall/sjson development by creating an account on GitHub.
2016 · github.com · its alternatives →
- 18
⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API - iamkun/dayjs
2018 · github.com · its alternatives →
- 19
Fast C based HTML 5 parsing for python. Contribute to kovidgoyal/html5-parser development by creating an account on GitHub.
2017 · github.com · its alternatives →
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Millions of developers have used quicktype to generate ten billion lines of typesafe models, serializers, and validators from JSON, JSON Schema, and GraphQL in TypeScript, Python, Swift, C#, Go, Rust, Kotlin, Java, C++, Zod and more. Use it in the browser, from the command line, or give it to your A
2017 · quicktype.io · its alternatives →
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- What's different? It's fast. On my machine, the stream decoder is faster than bytedance/sonic which claim to be the fastest even though mine is written in pure Go and Sonic is written in Go + C + Assembly. It also is a drop-in replacement of the standard library. - Why is it fast? technologies used are in my articles (available in English and Japanese) EN: https://sugawarayuuta.medium.com/still-i-wanted-to-build-the... JA: https://zenn.dev/sugawarayuuta/articles/2a5a3cb3f9a504
2023 · github.com · its alternatives →
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- 24JA
2015 · hperadin.github.io · its alternatives →
Also compare
- A fast JSON library for Go alternatives
- ffjson: faster json serialization in Go alternatives
- Gojay – Performant JSON encoder/decoder for Golang alternatives
- fastgron: A JSON to GRON Converter That's 40 Times Faster Than Gron alternatives
- Jason – A new JSON Library for Go alternatives
- Python JSON library in Rust, faster than ujson alternatives
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 →