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Free developer & design tools

Format JSON, encode a URL component, convert UTF-8 text to Base64 or inspect color values. Focused utilities are useful for checking a small example before adding it to an application. Formatting JSON does not validate a business schema, and Base64 is encoding rather than encryption. Read the input convention on each page, preserve important source data and test the output in the receiving system.

Color picker

Pick a color. Copy HEX, RGB or HSL.

Open Color picker →

JSON formatter

Validate, prettify or minify JSON with a clear error message.

Open JSON formatter →

Base64 encoder

Convert UTF-8 text to standard Base64 and back.

Open Base64 encoder →

URL encoder

Encode or decode a URL component without sending it anywhere.

Open URL encoder →

Choose another category

Know what validation actually checks

JSON syntax validation cannot confirm your application schema. Base64 decoding does not decrypt information. URL-component encoding does not establish whether a destination is trustworthy. Each tool has a narrow purpose, and the receiving system must expect the output convention.

Use harmless examples when debugging

Start with a short JSON object, a known text string or a standard HEX color. Check a round trip where possible, then compare the receiving application’s behavior. Do not paste API keys, authentication tokens or production customer data into debugging examples.

Category questions

How do I choose from these tools?

JSON syntax validation cannot confirm your application schema. Base64 decoding does not decrypt information. URL-component encoding does not establish whether a destination is trustworthy. Each tool has a narrow purpose, and the receiving system must expect the output convention.

What should I check before using the result?

Start with a short JSON object, a known text string or a standard HEX color. Check a round trip where possible, then compare the receiving application’s behavior. Do not paste API keys, authentication tokens or production customer data into debugging examples.

Do these tools require an account?

No. The listed utilities are free to use with no tool signup. Read the individual page for input limits and processing details.