Developer workflow

Free developer tools for everyday debugging

Format data, inspect a token, test a pattern, convert a payload, or diagnose a public endpoint. Tools state whether input stays on the device or requires a network request.

Format, convert, and inspect data

Use these utilities when moving data between systems or checking a payload before it reaches production.

JSON FormatterValidate, prettify, or minify JSON and find malformed input quickly.Format JSON → Base64 Encoder & DecoderEncode or decode UTF-8 text and files without confusing Base64 with encryption.Use Base64 → JWT DecoderInspect JWT headers, claims, and expiry locally without uploading the token.Inspect a JWT → CSV ↔ JSONConvert structured data in either direction and download the result.Convert data → JSON Schema ValidatorCheck a payload against a schema and review readable validation errors.Validate JSON → JSON to TypeScriptGenerate a practical TypeScript interface starting point from example JSON.Create types → YAML ↔ JSONMove configuration data between YAML and JSON while checking syntax.Convert config → SQL FormatterTurn dense SQL into readable code with dialect-aware formatting controls.Format SQL → JSON DiffCompare structured objects and identify changed paths and values.Compare JSON →

Generate, test, and diagnose

Focused checks for identifiers, patterns, integrity, URLs, and public infrastructure.

Regex TesterTest matches, flags, groups, and replacements against your own sample text.Test a regex → UUID GeneratorGenerate cryptographically strong UUID v4 identifiers in bulk.Generate UUIDs → Timestamp ConverterConvert Unix timestamps and readable dates in both directions.Convert time → URL Encoder & DecoderEncode query values or inspect percent-encoded URLs safely.Process a URL → HMAC GeneratorCreate an HMAC with a chosen algorithm for testing and verification.Generate HMAC → File ChecksumCalculate a digest locally to compare file integrity.Calculate checksum → HTTP Status CheckerInspect the response status and redirect behavior of a public URL.Check HTTP → DNS LookupReview common public DNS records for a domain during setup or diagnosis.Inspect DNS → SSL Certificate CheckerReview certificate identity, issuer, dates, and expiration for a public host.Check a certificate →

Use browser utilities safely

Do not paste production secrets

Local processing reduces exposure, but a browser tool is not a secrets manager. Use test data for private keys, session tokens, credentials, customer data, and production payloads.

Base64 is encoding, not encryption.
Decoded JWT claims are not proof that a signature is valid.
Rotate any secret accidentally shared with an untrusted service.

Local tools versus network checks

Formatters and encoders usually run locally. DNS, SSL, HTTP, redirect, and broken-link checks must contact a public target through a protected server API. Each tool should make this difference clear.

Only check hosts you are authorized to test.
Results may differ by location, cache, or resolver.
Confirm critical findings with the system owner.

Looking for another technical utility?

Browse formatters, validators, generators, SEO checks, calculators, and data tools in the complete directory.

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