Developer utilities with explicit input rules
Format JSON, convert CSV, encode text, generate UUIDs, and read Unix timestamps locally.
These utilities are for small examples, configuration checks, and data transformations you can inspect. They state their expected format instead of guessing whether a value is a number, an identifier, or a local time. Inputs stay in the page; the tools do not call an API, execute pasted code, or validate an application’s business rules.
6 tools found
JSON formatter & validator
Validate JSON, format it neatly, or make it compact.
Open toolCSV to JSON converter
Convert a delimited table into JSON without losing text fields.
Open toolBase64 encoder & decoder
Encode UTF-8 text as Base64, or decode it back.
Open toolURL component encoder
Encode or decode a URL component using percent escapes.
Open toolUUID v4 generator
Generate one or a batch of random version 4 UUIDs.
Open toolUnix timestamp converter
Convert Unix seconds or milliseconds to a UTC date and back.
Open toolNo tools found
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Syntax is not the same as correctness
Valid JSON can still have the wrong schema, and a decoded URL component can still point to an untrusted destination. Verify the receiving application’s requirements separately.
Preserve the distinctions
Encoding is reversible representation, a UUID names a record, and a timestamp needs a unit. Avoid treating unfamiliar-looking strings as interchangeable forms of security.
Put the tools in context.
All guidesFrom a spreadsheet export to useful JSON
Check delimiters, headers, quoting, and identifiers before converting a table for another application.
Encoding, hashing, and IDs do different jobs
Choose between Base64, URL encoding, SHA-256, UUIDs, and a password without confusing their purposes.
Dates, clock times, and timestamps are different inputs
Choose calendar-day counting, clock duration, or a UTC timestamp according to the question you actually need to answer.