How to debug JSON, Base64 and cron in your browser

Validate JSON before changing the application

Paste a sample response into JSON Formatter and run Beautify. Valid JSON becomes easier to inspect; invalid input produces a parser error. Common causes include trailing commas, single-quoted strings and unescaped newlines.

For an example, {"status":"ok","items":[1,2]} is valid JSON. Formatting changes whitespace, not the structure or meaning of the data. This formatter is not a JSON Schema validator and cannot tell you whether an API field is permitted by your application contract.

• Open JSON Formatter

Round-trip Base64 as text

Encode a known short string, then decode the result and compare it with the original. Select the URL-safe variant when your protocol expects that alphabet. ToolNest supports Unicode text, but a binary attachment is a different problem and this interface is not a binary file decoder.

Base64 is encoding, not encryption. A JWT may have Base64URL-encoded segments, but decoding one does not verify its signature or establish that its claims are trustworthy. Use your application's approved JWT library for signature validation.

• Open Base64 Encoder

Check the scheduler format and execution environment

The Cron Parser expects five fields: minute, hour, day of month, month and day of week. For example, 0 9 * * 1-5 describes 09:00 on weekdays in the scheduler's time zone. It is not a six-field seconds parser or a Quartz expression interpreter.

Check the actual scheduler documentation for time zone behavior, daylight saving changes, special syntax and missed-run handling. In this parser, when both day-of-month and day-of-week are restricted, the POSIX-style matching rule is OR. Other schedulers can interpret this differently. The tool explains syntax; it does not schedule a job or guarantee its next runtime.

• Open Cron Parser

Use hashes and identifiers for the right purpose

The text Hash Generator can compare a known sample against an expected digest. It hashes pasted text, not a selected binary file, and is not a password storage system. Match the text encoding and exact characters when comparing results.

UUID Generator is useful for fixtures and request identifiers. An identifier is not an access token or authorization check. When you need a secure secret, use an appropriate secret generator and storage system. Record the reproduction steps in your issue tracker using redacted sample input.

• Open Hash Generator
• Open UUID Generator

Questions