bug_report
Tester Kits
QA helpers for APIs, accessibility, test data, and debugging. · 29 tools
JSON & DataRuns locally in your browser.JSON FormatterPretty-print minified or messy JSON with consistent indentation.JSON & DataRuns locally in your browser.JSON ValidatorCheck whether text is valid JSON and pinpoint the first syntax error.JSON & DataRuns locally in your browser.JSONPath TesterRun JSONPath queries against a document and see matching values.JSON & DataRuns locally in your browser.JSON DiffCompare two JSON documents structurally and see what changed.EncodingRuns locally in your browser.UTF-8 InspectorSee the code points and UTF-8 bytes behind every character.EncodingRuns locally in your browser.JWT DecoderDecode a JWT's header and payload and check its expiry — locally.Security & CryptoRuns locally in your browser.SHA-256 GeneratorCompute the SHA-256 hash of any text using Web Crypto.Security & CryptoRuns locally in your browser.HMAC GeneratorCompute keyed HMAC-SHA256 or HMAC-SHA512 signatures.Security & CryptoRuns locally in your browser.UUID GeneratorGenerate cryptographically random UUID v4 identifiers.Security & CryptoRuns locally in your browser.Random String GeneratorGenerate random alphanumeric strings for tokens and test data.Text & RegexRuns locally in your browser.Regex TesterTest regular expressions with live match highlighting and group details.Text & RegexRuns locally in your browser.Text DiffCompare two texts and highlight added, removed, and changed lines.Text & RegexRuns locally in your browser.Extract Matching LinesKeep only the lines that contain a substring or match a regex.Text & RegexRuns locally in your browser.Remove Matching LinesDelete every line that contains a substring or matches a regex.Web & CSSRuns locally in your browser.Color Contrast CheckerCheck text/background color pairs against WCAG contrast ratios.API & HTTPUses the network.API Request TesterSend HTTP requests from your browser and inspect the full response.API & HTTPRuns locally in your browser.HTTP Status Code ReferenceSearchable reference for every HTTP status code and its meaning.API & HTTPRuns locally in your browser.Query String ParserBreak a query string into decoded key-value pairs.API & HTTPRuns locally in your browser.Basic Auth EncoderBuild a Basic Authorization header from username and password.API & HTTPRuns locally in your browser.Cookie ParserParse Cookie and Set-Cookie headers into readable attributes.API & HTTPRuns locally in your browser.User-Agent ParserDecode a User-Agent string into browser, engine, OS, and device.API & HTTPRuns locally in your browser.HTTP Method ReferenceReference for HTTP methods — semantics, safety, and idempotency.NetworkingUses the network.DNS LookupQuery A, AAAA, MX, TXT, CNAME, and NS records for any domain.NetworkingRuns locally in your browser.IP Address InspectorClassify an IP address and show its binary and integer forms.NetworkingRuns locally in your browser.Common Port ReferenceSearchable list of well-known TCP and UDP port assignments.SQL & DatabaseRuns locally in your browser.DB Connection String ParserBreak a database URI into host, port, user, database, and options.GeneratorsRuns locally in your browser.Sample JSON GeneratorGenerate realistic sample JSON records for testing and demos.GeneratorsRuns locally in your browser.Fake Data GeneratorGenerate fake names, emails, addresses, and phone numbers.GeneratorsRuns locally in your browser.API Mock Response GeneratorGenerate realistic mock API responses with status and body.