What Are Developer Text Tools?
Developer text tools are lightweight browser-based utilities that handle the everyday string manipulation and data formatting tasks that come up constantly during development. They cover validation, encoding, conversion, and generation - the kind of quick checks and transforms you'd otherwise write a one-off script for or dig through Stack Overflow to find.
These tools are particularly useful during debugging, API integration work, and data pipeline development, where you need to quickly inspect or transform a value without spinning up a REPL or installing a package.
This collection groups developer tools into four categories: validation (JSON, XML, URL, Base64, UUID), encoding and transformation (URL encoding, HTML entities, binary, hex, Unicode), generation (UUIDs, random strings), and cleanup (stripping HTML tags and non-printable characters). All tools run privately in your browser.
Validation Tools
Paste a value and instantly know if it's valid - no tooling required. Useful during API debugging, data ingestion, and schema validation work.
- JSON Validator: Validate and pretty-print JSON. Syntax errors are highlighted inline - useful when debugging API responses or config files.
- XML Validator: Check XML structure and well-formedness. Catches unclosed tags, invalid nesting, and encoding issues.
- URL Validator: Validate a URL and get a full breakdown of its components - protocol, host, path, query params, and fragment.
- Base64 Validator: Check whether a string is valid Base64 and decode it to inspect the raw content.
- UUID Validator: Validate a UUID and identify its version (v1 through v8).
Encoding & Conversion Tools
Convert strings between encoding formats. Useful for building URLs, debugging encoding issues, inspecting binary data, or working with character sets.
- URL Encoder / Decoder: Percent-encode or decode strings for use in query parameters and URL construction.
- HTML Entities: Encode special characters to HTML entities or decode entity strings back to plain text - useful for template work and XSS prevention.
- Binary Converter: Convert text to binary representation and back. Useful for low-level debugging and data inspection.
- Hex Converter: Convert text or numeric values to hexadecimal and back. Useful for color values, byte inspection, and encoding work.
- Unicode Converter: Convert characters to Unicode code points and back - useful when debugging encoding issues across systems or APIs.
Generation Tools
Generate test data and identifiers on demand without writing a script.
- UUID Generator: Generate RFC-compliant UUIDs in bulk across versions v1 through v7. Useful for seeding test databases or generating unique identifiers.
- Random String Generator: Generate random strings with configurable length and character set - useful for test fixtures, tokens, and mock data.
Cleanup Tools
Strip unwanted characters from strings before processing or storage.
- Remove HTML Tags: Strip HTML markup from a string to extract clean plain text - useful when sanitizing user input or processing scraped content.
- Remove Non-Printable Characters: Strip control characters, null bytes, and other invisible characters that can break parsers, databases, or APIs.
Use Cases
API Debugging
Paste a raw API response into the JSON Validator to check structure and spot syntax errors. Use URL Encoder to manually construct or inspect query strings. Decode Base64 tokens to inspect JWT payloads or encoded credentials.
Database & Schema Work
Generate UUIDs in bulk for seeding test data. Use the UUID Validator to check existing IDs in a dataset. Strip non-printable characters from imported strings before inserting into a database.
Frontend & Template Development
Convert special characters to HTML entities to safely embed user content in templates. Use the hex converter for color value manipulation. Strip HTML tags from rich text fields when rendering plain-text previews.
Data Pipeline Work
Validate XML from third-party feeds before parsing. Use the binary and hex converters to inspect raw byte values during encoding debugging. Remove non-printable characters from CSV imports that cause parser failures.
Frequently Asked Questions
Does the JSON validator support JSON5 or comments?
The validator follows the strict JSON spec (RFC 8259) and does not support JSON5, comments, or trailing commas. It validates standard JSON only.
What UUID versions does the generator support?
The UUID generator supports versions v1 through v7, covering time-based, random, and name-based variants. Each generated UUID is RFC 4122 compliant.
What is the difference between URL encoding and Base64 encoding?
URL encoding (percent encoding) replaces unsafe characters with a percent sign followed by two hex digits, and is used specifically for encoding values within URLs. Base64 encodes binary data as ASCII text using a 64-character alphabet, and is used for transmitting binary data in text-based formats like JSON or HTTP headers.
Can the HTML entity tool handle Unicode characters?
Yes - the HTML entities tool encodes characters outside the basic ASCII range to their numeric Unicode entity equivalents, which are safe to use in any HTML document regardless of charset declaration.