Tool Cluster

9 local tools

Developer Tools

Format, convert, compare, inspect, and generate local developer artifacts for JSON, CSV, URLs, timestamps, IDs, hashes, and colors.

Local-onlyNo uploadTask chooser

Which tool should I use?

NeedUseInputNotes
Format or validate payloadsJSON Formatter/ValidatorJSONStrict JSON parser.
Convert tabular dataCSV to JSON ConverterCSV or TSVHeader and delimiter controls.
Compare API responsesJSON Diff CheckerTwo JSON valuesIgnores key order.
Inspect token claimsJWT DecoderJWTDecode only, no signature verification.
Generate sortable IDsULID GeneratorOptionsIncludes timestamp decode.

Developer tool entries

Color ConverterConvert HEX, RGB/RGBA, and HSL/HSLA colors with local swatches and copyable CSS output.CSV to JSON ConverterConvert pasted CSV or TSV into JSON arrays locally with delimiter and header controls.Hash GeneratorGenerate common text hashes locally and compare checksum strings.JSON Diff CheckerCompare two JSON inputs semantically and list path-level changes locally.JSON Formatter/ValidatorFormat, minify, and validate JSON with clear parser errors.JSON to CSV ConverterConvert JSON arrays or objects to CSV locally with flattening and quote controls.JWT DecoderDecode JWT header and payload locally, with optional HS256, HS384, and HS512 signature matching when you provide a secret.ULID GeneratorGenerate, validate, and decode ULID timestamps locally.UUID GeneratorGenerate 1 to 100 UUID v4 values using the browser crypto API.

Practical examples

API debugging flow

Format a response, parse the request query, decode a JWT claim, then convert any epoch timestamps.

JSONQuery ParserJWTTimestamp

Workflow notes

Format and compare

Start with JSON Formatter, then use JSON Diff when you need path-level changes.

JSONJSON Diff

Generate and inspect

Use UUID for random IDs, ULID for sortable IDs, and Hash Generator for checksums.

UUIDULIDHash

Security-adjacent caveat

JWT Decoder and Hash Generator are local inspection helpers, not security audits.

JWTHash

Adjacent categories

Encoding tools

Decode URLs, Base64, HTML entities, images, and token-adjacent values.

Text tools

Count, clean, and normalize text while preparing docs or examples.

FAQ

Do developer tools call external APIs?

No. The listed tools run in the browser and do not upload inputs.

Which ID tool should I choose?

Use UUID v4 for random identifiers and ULID when sort order by creation time is useful.