Show HN: JSONXMLKit – Format JSON/XML and Decode Base64 in the Browser

3•makertoo•9mo ago

I built this because I was constantly switching tabs to format JSON or XML, or decode Base64 — and many of the tools I found were either bloated, sent my data to a server, or just didn’t support things like XPath or JSONPath.

JSONXMLKit runs 100% in-browser, and includes:

JSON and XML formatters

Path search with JSONPath and XPath

File-based Base64 encoder/decoder (images, PDFs, etc.)

No login, no uploads. Just a set of quick, client-side tools I needed and decided to share. Feedback welcome!

Comments

makertoo•9mo ago

I put this together after getting tired of using bulky or ad-heavy sites just to format JSON or XML. Everything runs in the browser and there’s no upload involved.

If you end up trying it, I’d love to know: What’s the one feature you’d want in a tool like this?

Thanks for checking it out!

Mathis96•9mo ago

Just tried it out — love how fast and clean it is. Nice to see something that doesn’t require uploads or popups everywhere.

Curious though — how does it handle really large JSON files? Are you planning to add YAML support too?

makertoo•9mo ago

Yaml will be added soon yes. All you files are handled within your browser, so it really depends on it to handle large files (Json or Xml or encoded/decoded files).

account-5•9mo ago

I tend to use CyberChef for this sort of thing: https://gchq.github.io/CyberChef/

Scientists reverse Alzheimer's in mice and restore memory (2025)

Compiling Prolog to Forth [pdf]

Show HN: Cymatica – an experimental, meditative audiovisual app

GitBlack: Tracing America's Foundation

Horizon-LM: A RAM-Centric Architecture for LLM Training

We just ordered shawarma and fries from Cursor [video]

Correctio

Trying to make an Automated Ecologist: A first pass through the Biotime dataset

Watch Ukraine's Minigun-Firing, Drone-Hunting Turboprop in Action

Free Trial: AI Interviewer

FDA Intends to Take Action Against Non-FDA-Approved GLP-1 Drugs

Supernote e-ink devices for writing like paper

We are QA Engineers now

Show HN: Measuring how AI agent teams improve issue resolution on SWE-Verified

Adversarial Reasoning: Multiagent World Models for Closing the Simulation Gap

Show HN: Poddley.com – Follow people, not podcasts

Layoffs Surge 118% in January – The Highest Since 2009

Papyrus 114: Homer's Iliad

DicePit – Real-time multiplayer Knucklebones in the browser

Turn-Based Structural Triggers: Prompt-Free Backdoors in Multi-Turn LLMs

Show HN: AI Agent Tool That Keeps You in the Loop

Why Every R Package Wrapping External Tools Needs a Sitrep() Function

Achieving Ultra-Fast AI Chat Widgets

Show HN: Runtime Fence – Kill switch for AI agents

Researchers surprised by the brain benefits of cannabis usage in adults over 40

Peter Thiel warns the Antichrist, apocalypse linked to the 'end of modernity'

USS Preble Used Helios Laser to Zap Four Drones in Expanding Testing

Show HN: Animated beach scene, made with CSS

An update on unredacting select Epstein files – DBC12.pdf liberated

Was going to share my work