Data, readable
Pretty-print and validate JSON, walk it as a tree, and convert between JSON, YAML, CSV, and typed code.
Developer & Data
The developer scratchpad, all on your Mac.
Foldout's developer tools format and inspect JSON, test regex, decode JWTs, convert timestamps and number bases, parse URLs, generate hashes and IDs, and more - the little utilities you keep a browser tab open for, gathered into one fast, local toolbox.
Start the 14-day trial in the app. No payment method is required to try Foldout.
Use Foldout only with files and content you own or have permission to process.
Processes on your MacTool work stays inside the local app.
Signed and notarizedBuilt for Apple Silicon Macs.
No usage trackingFoldout does not track what you do in the app.
Paddle checkoutPaddle shows price, tax, and terms before purchase.
What it does
Format, decode, convert, and inspect, all locally.
Format, validate, and explore JSON as a tree.
Test regex and preview replacements live.
Decode JWTs and convert timestamps, bases, and cases.
Everything runs locally - tokens and data never leave.
Detailed capabilities
What Developer Tools covers.
Concrete features, inputs, and workflow details for this tool.
The daily conversions
Decode a JWT, turn a Unix timestamp into a date, flip a number base, or re-case an identifier without leaving the app.
Private by default
Paste real tokens, payloads, and secrets - they are processed on your Mac and never sent to a server.
How to use it
From opening the tool to saving the result.
- 01
Open Foldout and pick a developer tool.
- 02
Paste your text, code, or data.
- 03
Read the result or tweak the options.
- 04
Copy the output back into your work.
Questions
Before you try Developer Tools
Does my data get sent anywhere?
No. Foldout's developer tools run on your Mac, so tokens, payloads, and snippets stay local.
What formats are covered?
JSON, YAML, CSV, regex, JWT, timestamps, URLs, hashes, IDs, and more.
Can I use it offline?
Yes. These tools work without a network connection.
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