Developer Tools

Paste your JSON into JSON Formatter & Validator and run it. The tool indents the data for easy reading and points to syntax errors such as a missing comma or an extra bracket. Fix the flagged line and run it again until the JSON validates.

JSON uses braces, brackets, and quotes, so it is strict and common in APIs. YAML relies on indentation and reads more cleanly, which makes it popular for configuration files. YAML to JSON Converter moves data from one format to the other without retyping.

Paste the token into JWT Decoder and it splits the three parts, then shows the header and payload as readable JSON. You can check claims such as expiry time and issuer. Decoding does not verify the signature, so it cannot prove a token is genuine.

MD5 produces a 128 bit hash and is fast, but researchers have found collisions, so it no longer suits security work. SHA-256 produces a 256 bit hash and remains the standard choice. Hash Generator (MD5/SHA-256) creates both for checksums and comparisons.

Paste the number into Timestamp Converter (Unix ↔ Date) and read the date and time it represents. You can also enter a date to get its Unix value. A 10 digit value counts seconds, and a 13 digit value counts milliseconds.

A cron expression has five fields for minute, hour, day of month, month, and day of week. Cron Expression Generator lets you pick a schedule from options and returns the correct string. For example, 0 9 * * 1 runs every Monday at 9:00.

Open Regex Tester, enter your pattern, and paste sample text to see every match highlighted. Adjust flags such as global or case insensitive to change behavior. Testing against both matching and non matching examples catches patterns that match too much.

The title tag and meta description matter most, because search results display them. Open Graph tags control how links look when shared on social networks. Meta Tags Generator builds all of these in one block that you paste into your page head.