Dev tools · alternatives · 2026

24 alternatives to MaskJSON

Mask sensitive fields in JSON instantly

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

1
Masked Emails by 1Password▲164
Protect your online privacy with unique email addresses
2021 · marketplace.1password.com · its alternatives →
2
SafeJSON — Privacy▲2
A JSON formatter that never sees your data
Jun 2026 · safejson.dev · its alternatives →
3
MaskLLM▲132
Mask your LLM APIs for secure rotation and logging
2025 · maskllm.com · its alternatives →
4
JSON-Threat-Protection Rust High-Performance Crate▲34
A crate to protect against malicious JSON payloads. - ADD-SP/json-threat-protection.rs
2024 · github.com · its alternatives →
5MA
Maskmail – anonymous email address service▲110
2018 · maskmail.net · its alternatives →
6
Quick JSON Formatter▲72
Quickly formats JSON with a simple right click, no copy
2023 · chromewebstore.google.com · its alternatives →
7
DataMask▲118
Mask private data before taking screenshots
2019 · chromewebstore.google.com · its alternatives →
8
JSON Sharp▲73
Tool for lazy developers to convert JSON to C# Objects
2020 · jsontocsharpconverter.web.app · its alternatives →
9
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 →
10
JSON diff▲72
Compare 2 JSON and find difference
2021 · its alternatives →
11
ffjson: faster json serialization in Go▲83
2014 · journal.paul.querna.org · its alternatives →
12
Jsn – A relaxed, user-friendly JSON-like data format▲18
A relaxed, user-friendly json-like data format. Contribute to polymonster/jsn development by creating an account on GitHub.
2019 · github.com · its alternatives →
13
Privacy Field Masker Chrome Extension▲3
Hide sensitive data before screen sharing
Jun 2026 · exlicense.swadhinkhan.com · its alternatives →
14
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 →
15
A simple API to store and retrieve JSON objects▲18
2015 · openbucket.io · its alternatives →
16
PJSON.live▲15
Format, validate & convert json to typescript instantly
Nov 2025 · pjson.live · its alternatives →
17
JSON Minifier: Fast & Secure▲3
Compress JSON data instantly for faster web performance.
Feb 2026 · 99tools.net · its alternatives →
18
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 →
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
Json Clear Values▲9
Sanitize, Empty, Clean json online
2025 · its alternatives →
21
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 →
22
See – searchable JSON compression (offline 10-min demo)▲5
Hi HN, I’m building SEE (Semantic Entropy Encoding): a searchable compression format for JSON/NDJSON. Goal: reduce the “data tax” (storage/egress) and “CPU tax” (decompress/parse) by keeping JSON searchable while compressed, with page-level random access. I just published a proof-first evaluation release: Offline DEMO ZIP (~10 min): prints compression ratios + skip rates + lookup latency (p50/p95/p99) DD pack: audit/repro evidence (decode mismatch=0, extended mismatch=0, audit PASS) Latest release:…
Feb 2026 · gitlab.com · its alternatives →
23
Searchable compression for JSON – ~99% page skip and sub-ms lookups▲15
Problem JSON/NDJSON is everywhere in data platforms, but compression usually breaks searchability. You either keep queryable raw stores (high I/O/egress) or compress into gz/zstd blobs (cheap to store, painful to probe). The “cloud tax” shows up as wasted reads. What I built (SEE — Semantic Entropy Encoding) A schema-aware, searchable compression codec for JSON that keeps exists/pos lookups fast while still compressing. Internals: structure-aware delta + dictionaries, a PageDir + mini-index to jump to relevant pages, and a tuned Bloom filter that skips ~99% of pages.…
2025 · github.com · its alternatives →
24
Free JSON Formatter▲3
Format, validate and minify JSON instantly
Jun 2026 · tools.bmjapps.in · 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 →