Life & fun · alternatives · 2026

24 alternatives to ffjson: faster json serialization in Go

ffjson is a code generation tool for the Go programming language that accelerates JSON serialization by producing static code for JSON encoding interfaces. Rather than relying on Go's standard encoding/json library, it… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ffjson: faster json serialization in Go launched in 2014; newer entries below may have overtaken it.

1
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 →
2
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 →
3
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 →
4
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 →
5
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 →
6
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 →
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
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 →
9GI
GoCode.io – A Golang Game in the Browser▲129
2019 · gocode.io · its alternatives →
10
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 →
11
LJSON: JSON extended with pure functions▲39
JSON extended with pure functions. Contribute to VictorTaelin/LJSON development by creating an account on GitHub.
2015 · 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 →
13JA
JSONScript – Asynchronous scripting language using JSON format▲49
2016 · json-script.com · its alternatives →
14
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 →
15
Generate JSON▲77
AI-generated dummy JSON - deploy in seconds
2023 · jsonviewer.stack.hu · its alternatives →
16
The fastest JSON parser for Go▲7
THE fastest alternative JSON parser for Go that does not require schema - buger/jsonparser
Jul 2026 · github.com · its alternatives →
17AF
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 →
18
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 →
19JA
JSON as Fast as Binary▲12
2015 · hperadin.github.io · its alternatives →
20
SJSON – a fast and simple way to set a value in JSON▲11
Set JSON values very quickly in Go. Contribute to tidwall/sjson development by creating an account on GitHub.
2016 · github.com · its alternatives →
21
JSON Sharp▲73
Tool for lazy developers to convert JSON to C# Objects
2020 · jsontocsharpconverter.web.app · its alternatives →
22
JSON5 — modern JSON▲64
JSON5 — JSON for Humans. Contribute to json5/json5 development by creating an account on GitHub.
2012 · github.com · its alternatives →
23
Cyjson – Fast and Efficent JSON Parser for Python▲10
2015 · github.com · its alternatives →
24
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 →

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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 →