Life & fun · alternatives · 2026

24 alternatives to The fastest JSON parser for Go

THE fastest alternative JSON parser for Go that does not require schema - buger/jsonparser

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
A fast JSON library for Go▲119
Fast JSON encoder/decoder compatible with encoding/json for Go - goccy/go-json
2021 · github.com · its alternatives →
2
fastjson - Fast JSON Parsing for Go▲20
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection - valyala/fastjson
2018 · github.com · its alternatives →
3
jql – Easier jq Alternative with a Lispy Syntax Written in Go▲217
Easy JSON Query Processor with a Lispy syntax in Go - cube2222/jql
2020 · github.com · its alternatives →
4
Gojay – Performant JSON encoder/decoder for Golang▲153
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 →
5
ffjson: faster json serialization in Go▲83
2014 · journal.paul.querna.org · its alternatives →
6
Wrote a JSON parser from scratch in go▲22
First time ever working on something like this, check it out
2024 · github.com · its alternatives →
7
Jason – A new JSON Library for Go▲106
Easy-to-use JSON Library for Go. Contribute to antonholmquist/jason development by creating an account on GitHub.
2014 · github.com · its alternatives →
8
Sonnet – The fastest JSON parser I can think of in Go▲7
- 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 →
9
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 →
10
Very low footprint JSON parser in portable ANSI C▲111
Very low footprint DOM-style JSON parser written in portable ANSI C - json-parser/json-parser
2012 · github.com · its alternatives →
11
gq – like jq or zq, but you use Go▲107
Hi HN. I've gotten pretty tired of needing to learn a custom programming language for a tool I use once a week or less. So I figured, it might be easier to pick up if `jq` used a programming language I already know. Voila, gq.
2022 · github.com · its alternatives →
12
Python JSON library in Rust, faster than ujson▲40
Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy - ijl/orjson
2018 · github.com · its alternatives →
13
Gojay – highly performant JSON encoder/decoder for Golang▲11
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 →
14
uDSV.js – A faster CSV parser▲67
Hey folks! I know CSV parsers (especially in JS) aren't terribly exciting and someone writes a "better" one every week. I'm in the middle of my parental leave, and this was a project that came out of me looking for the fastest/smallest CSV parser. It all started so innocently, and then turned into a benchmark-validation-athon; the library itself took ~2 weeks to write, but the performance comparisons took another ~4 weeks (on and off). The benchmarks were a huge effort, but I think they are the most thorough to date, both in breadth and in depth, so hopefully you find them useful:…
2023 · github.com · its alternatives →
15AF
Apache Fory Rust – 10-20x faster serialization than JSON/Protobuf▲67
Serialization framework with some interesting numbers: 10-20x faster on nested objects than json/protobuf. Technical approach: compile-time codegen (no reflection), compact binary protocol with meta-packing, little-endian layout optimized for modern CPUs. Unique features that other fast serializers don't have: - Cross-language without IDL files (Rust ↔ Python/Java/Go) - Trait object serialization (Box) - Automatic circular reference handling - Schema evolution without coordination Happy to discuss design trade-offs. Benchmarks:…
Oct 2025 · fory.apache.org · its alternatives →
16
Weird JSON superset with BigInt, Infinity, TypedArray etc▲67
the JS/Node.JS library for encoding complex and unconventional data structures. Support for BigInts, TypedArrays, null, undefined, and Symbol. Multiple flavors available. - DO-SAY-GO/WeirdJSON
2020 · github.com · its alternatives →
17
Gosax – A high-performance SAX XML parser for Go▲76
I've just released gosax, a new Go library for high-performance SAX (Simple API for XML) parsing. It's designed for efficient, memory-conscious XML processing, drawing inspiration from quick-xml and pkg/json. https://github.com/orisano/gosax Key features: - Read-only SAX parsing - Highly efficient parsing using techniques inspired by quick-xml and pkg/json - SWAR (SIMD Within A Register) optimizations for fast text processing gosax is particularly useful for processing large XML files or streams without loading the entire document into memory. It's well-suited…
2024 · github.com · its alternatives →
18
fastgron: A JSON to GRON Converter That's 40 Times Faster Than Gron▲23
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 →
19
JSONBason▲15
I've been at it again, just sharing my simple JSON data inspection tool, love webdev and single page apps, this one took 4 days and was a lot of fun. The code is not obfuscated so you can inspect it and see how it works (very simple, server side is even more simple) Pretty much just do a POST of your JSON data from within your code and it will convert it into a basic table for instant search and sort. Made with love for the fun of it, no ads, no paid anything, it's totally free. Please only send in sanitized/test data only, this is meant to help make webdev a bit easier and more fun.…
2025 · jsonbason.com · its alternatives →
20
StaticJSON: fast, direct and static typed parsing of JSON with C++▲18
Fast, direct and static typed parsing of JSON with C++ - netheril96/StaticJSON
2016 · github.com · its alternatives →
21
A lightweight JSON Parser without memory allocation in ~250 LOC▲9
2014 · github.com · its alternatives →
22
JSON Parser▲8
Awesome way to view JSON.
2018 · jsonformatter.org · its alternatives →
23
Weird JSON▲19
the JS/Node.JS library for encoding complex and unconventional data structures. Support for BigInts, TypedArrays, null, undefined, and Symbol. Multiple flavors available. - DO-SAY-GO/WeirdJSON
2022 · github.com · its alternatives →
24
JSONPlus: a json parser with self reference and templating▲7
JSON parser that supports self reference and comments - serkanyersen/jsonplus
2015 · github.com · its alternatives →

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