Common uses
What you can do here
- Format JSON before debugging
- Escape HTML snippets for docs
- Decode JWT payloads locally
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Developer Utilities
Small practical utilities for debugging payloads, preparing snippets and cleaning structured text during development.
13 Tools Runs locally in your browser No uploads
FAQ
FAQ
Does the JWT decoder verify signatures?
No. It decodes JWT header and payload content only. It does not verify whether a token is trusted.
Are these tools meant for production secrets?
Avoid pasting secrets into any web tool. These utilities run locally, but sensitive secrets should still be handled carefully.
Developer tools
All converters
Developer tools
Popular
JSON Formatter
Format, validate and beautify JSON with clear indentation.
- Pretty print
- Validation
- Clean output
Developer tools
JSON Minifier
Remove whitespace from JSON while keeping it valid.
- Smaller output
- Validation
- Instant
Developer tools
Query String to JSON
Parse URL query parameters into readable JSON for debugging links, API calls and tracking URLs.
- Full URL support
- Repeated keys
- Pretty JSON
Developer tools
JSON to Query String
Build URL query strings from JSON objects for links, API requests and test URLs.
- Object keys
- Array values
- URL encoded
Developer tools
JSON to JSONL
Convert JSON arrays or objects into newline-delimited JSON for logs, data pipelines and AI datasets.
- Array support
- One JSON value per line
- Dataset friendly
Developer tools
JSONL to JSON
Parse newline-delimited JSON into a formatted JSON array for inspection, scripts and data cleanup.
- Line validation
- Pretty JSON array
- Local parsing
Developer tools
HTML Escape
Escape HTML-sensitive characters for safe display in markup.
- Escapes tags
- Code friendly
- Instant
Developer tools
HTML Unescape
Decode HTML entities back into readable characters.
- Entity decoding
- Readable output
- Instant
Developer tools
Regex Escape
Escape special regex characters so plain text can be used safely inside regular expressions.
- Escapes metacharacters
- Pattern friendly
- Instant copy
Developer tools
Decimal to HEX
Convert whole decimal numbers into hexadecimal notation.
- Whole numbers
- Uppercase HEX
- 0x prefix
Developer tools
HEX to Decimal
Convert hexadecimal numbers into decimal whole numbers.
- 0x optional
- Whole numbers
- Instant result
Developer tools
UUID Generator
Generate one or more UUID v4 values locally for testing, development and mock data.
- UUID v4
- Multiple IDs
- Local generation
Developer tools
JWT Decoder
Decode JWT header and payload locally without verifying the signature.
- Header
- Payload
- Local only