Essential Developer Utilities
Fast, secure, 100% browser-based tools for formatting JSON, encoding URLs, Base64 conversion, HTML entities, and UUID generation.
Select a Utility
JSON Formatter
Prettify and format JSON data with syntax validation
TOOL DIRECTORY
Included Developer Utilities
Switch between tools above or bookmark dedicated pages for your daily workflow.
{ }JSON Formatter & Minifier
Validate and format messy JSON strings with custom 2-space, 4-space, or tab indents. Also compresses JSON to a single compact line.
Open standalone tool →%URL Encoder & Decoder
Safely encode text and query parameters using standard percent-encoding, or decode encoded URLs and URI components back to plain text.
Open standalone tool →64Base64 Encoder & Decoder
Fast, UTF-8 compliant Base64 encoding and decoding. Safely encode strings, passwords, and JSON payloads with instant error validation.
Open standalone tool →< >HTML Entity Encoder
Escape special HTML characters (&, <, >, ", ') to avoid XSS injection, or decode entities back to readable HTML markup.
Open standalone tool →IDUUID Generator
Generate batch RFC 4122 v4 UUIDs using the Web Cryptography API. Options for uppercase, lowercase, hyphens, and curly braces.
Open standalone tool →TxText Cleaner Suite
Remove extra spaces, blank lines, duplicate items, strip line breaks, and sort lines A–Z with live before/after stats.
FAQ
Frequently Asked Questions
Are my JSON payloads, tokens, or strings sent to a server?
No. All developer tools run entirely on your local machine inside your browser's JavaScript engine. No input data, API keys, JSON payloads, or encoded strings ever leave your computer.
How does the JSON Formatter handle malformed JSON?
If your JSON syntax has errors (such as missing quotes, trailing commas, or unbalanced braces), the formatter catches the syntax exception immediately and highlights the exact error reason and position.
Does the Base64 tool properly support UTF-8 characters and emojis?
Yes. Our Base64 encoder and decoder utilize the native TextEncoder and TextDecoder APIs, ensuring multi-byte Unicode characters, accented letters, and emojis encode and decode with zero data corruption.
What specification does the UUID Generator use?
It produces RFC 4122 Version 4 compliant Universally Unique Identifiers using the Web Cryptography API (crypto.randomUUID()) for high-entropy pseudorandom generation.
Can I download formatted outputs directly?
Yes. You can download formatted JSON as .json files and other processed text or generated UUIDs as .txt files with one click.
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JSON Formatter
Prettify and format JSON data with syntax validation
URL Encoder & Decoder
Convert text and query parameters into percent-encoded URL format
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HTML Entity Encoder
Convert reserved HTML characters into safe HTML entities