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ToolsGuides

Tools directory

API, QA and Developer Tools Directory

Search and filter a browser-local workbench for API contracts, structured data, HTTP debugging, authentication, QA design, and everyday developer utilities.

Need background before choosing a workflow? Read the developer guides for practical notes on identifiers, JSON, JWTs, timestamps, hashes, URLs, passwords, and safe browser-based tools.

67

Tools

17

Categories

Local

Processing

67 tools found

UUID

UUID Generator

Create random or time-ordered UUIDs with formatting controls.

Open toolUUID

UUID v4 Generator

Generate RFC-style random UUID v4 identifiers.

Open toolUUID

UUID v7 Generator

Create time-ordered UUID v7 identifiers.

Open toolUUID

Bulk UUID Generator

Generate large UUID batches for fixtures, imports, and tests.

Open toolJSON

JSON Formatter

Pretty print JSON and make nested data easier to read.

Open toolJSON

JSON Validator

Check JSON syntax and view a formatted valid preview.

Open toolJSON

JSON Minifier

Remove unnecessary whitespace from valid JSON.

Open toolJSON

JSON to String

Escape JSON or text for use inside strings and reverse it when needed.

Open toolEncoding

Base64 Encode

Encode Unicode text into Base64 safely in your browser.

Open toolEncoding

Base64 Decode

Decode Base64 into readable Unicode text.

Open toolEncoding

JWT Decoder

Decode JWT header and payload without sending tokens to a server.

Open toolTime

Unix Timestamp Converter

Convert timestamps and dates in seconds or milliseconds.

Open toolTime

Cron Expression Generator

Create common 5-field cron expressions with local explanations.

Open toolHashing

SHA-256 Generator

Create SHA-256 hashes from text with native browser cryptography.

Open toolHashing

MD5 Generator

Create MD5 hashes for legacy checksum use cases.

Open toolURL

URL Encode

Encode full URLs or URL components with native browser functions.

Open toolURL

URL Decode

Decode percent-encoded URL text safely in your browser.

Open toolSecurity

Password Generator

Generate strong random passwords locally with browser cryptography.

Open toolJSON

JSON String Escape

Escape arbitrary text as a valid JSON string literal.

Open toolJSON

JSON String Unescape

Decode a JSON string literal into readable text.

Open toolDiagram

Mermaid Diagram Renderer

Write Mermaid source, preview a sanitized diagram, and export SVG or PNG.

Open toolYAML

YAML Validator

Validate YAML syntax with normalized line and column issues.

Open toolYAML

YAML Formatter

Parse and format YAML while preserving comments where the parser supports them.

Open toolYAML

YAML to JSON Converter

Convert supported YAML mappings and sequences to valid JSON.

Open toolYAML

JSON to YAML Converter

Convert valid JSON objects, arrays, and primitives to safe YAML.

Open toolAPI

OpenAPI Viewer

Explore local OpenAPI 3.x YAML or JSON by tag, path, operation, and schema.

Open toolAPI

OpenAPI Validator

Validate OpenAPI 3.x syntax, required structure, operations, and local references.

Open toolAPI

OpenAPI Endpoint Extractor

Create a searchable endpoint inventory and export CSV, JSON, or Markdown.

Open toolAPI

OpenAPI to Markdown

Generate configurable Markdown documentation from a local OpenAPI 3.x document.

Open toolHashing

Hash Generator

Generate SHA-256, SHA-1, or MD5 digests for text and local files and compare known values.

Open toolTime

Cron Expression Explainer

Explain a five-field cron expression and preview upcoming runs in a selected timezone.

Open toolJSON

JSON Schema Validator

Validate JSON syntax separately from a JSON Schema Draft 2020-12 contract.

Open toolQA

JSON / YAML Deep Diff

Compare parsed JSON or YAML structures rather than line-oriented text.

Open toolAPI

OpenAPI Diff and Breaking Change Analyzer

Compare old and new OpenAPI 3.x contracts with conservative compatibility classifications.

Open toolAPI

OpenAPI Example Generator

Inspect source-defined examples or generate clearly labeled synthetic placeholders from OpenAPI schemas.

Open toolQA

OpenAPI Test Matrix Generator

Turn declared OpenAPI constraints into traceable QA test ideas.

Open toolHTTP

HTTP Header Analyzer

Parse a raw header block and redact a documented set of common credential-bearing fields.

Open toolHTTP

CORS Analyzer

Model a browser CORS scenario from request context and pasted response fields.

Open toolHTTP

RFC 9457 Problem Details Validator

Inspect the basic structure of an application/problem+json document.

Open toolURL

Query String Builder and Parser

Build encoded query strings or parse full URLs while preserving repeated keys and blank values.

Open toolHTTP

cURL ↔ Fetch Converter

Translate a practical request subset between cURL command text and browser Fetch code.

Open toolQA

API Pagination Test Helper

Generate pagination invariants and boundary scenarios without calling a live API.

Open toolAuthentication

JWT Claim Test Matrix Generator

Turn an expected JWT claim policy into synthetic contract-level test cases.

Open toolQA

Regex Tester and Debugger

Inspect regex matches, ranges, capture groups, and named groups against local test text.

Open toolJSON

JSONPath Tester

Select JSON values with bounded JSONPath expressions and visible result paths.

Open toolJSON

JSON to TypeScript

Infer a stable TypeScript type from example JSON without evaluating code.

Open toolJSON

JSON to JSON Schema

Infer a Draft 2020-12 style JSON Schema from observed values and objects.

Open toolJSON

NDJSON Viewer

Inspect JSON Lines with per-line errors, search, counts, and valid-record export.

Open toolJSON

JSON Flatten and Unflatten

Convert nested JSON into an escaped JSON Pointer map and reconstruct it.

Open toolXML

XML Formatter and Validator

Validate XML syntax and format element-only structures locally.

Open toolXML

XPath Tester

Select XML nodes and values using browser XPath 1.0 and namespace mappings.

Open toolXML

XML and JSON Converter

Convert XML and JSON using explicit attribute, text, and repeated-element rules.

Open toolStructured Data

CSV and TSV Viewer

Preview delimited files with quoted-cell parsing, counts, search, and capped rendering.

Open toolStructured Data

CSV and JSON Converter

Convert header-based CSV to JSON objects and flat JSON objects to CSV.

Open toolQA

SQL Formatter

Format SQL locally with selected dialect and keyword casing, without execution.

Open toolGraphQL

GraphQL Formatter and Syntax Checker

Parse and format GraphQL documents while listing operations and fragments.

Open toolGraphQL

GraphQL Operation Analyzer

Inventory GraphQL operations, variables, root fields, fragments, and QA findings.

Open toolNetwork

HAR Viewer and Analyzer

Summarize a local HAR by hosts, methods, statuses, failures, timing, and MIME.

Open toolNetwork

Cookie and Set-Cookie Analyzer

Inspect request cookies and response attributes with redacted values and warnings.

Open toolSecurity

Content Security Policy Analyzer

Parse CSP directives and flag common risky sources or duplicate declarations.

Open toolURL

URL Parser and Inspector

Inspect URL components, repeated query parameters, fragments, and credential presence.

Open toolNetwork

HTTP Request Inspector

Parse a raw HTTP request line, headers, query, cookies, content type, and body presence.

Open toolNetwork

HTTP Response Inspector

Inspect status, headers, cookies, content type, cache and CORS fields in a response.

Open toolNetwork

Content-Type Inspector

Parse media type, subtype, charset, boundary, and other Content-Type parameters.

Open toolQA

Text and Code Diff

Compare lines of text or code with additions, removals, and whitespace options.

Open toolQA

Semantic Version Comparator

Compare or sort strict SemVer versions including prerelease identifiers.

Open toolSecurity

Environment File Inspector

Find dotenv-style duplicate keys, malformed assignments, empty values, and suspicious names.

Open tool

QA workbench

Featured workbench tools

Move from API contracts through structured data, GraphQL, XML, and network evidence.

OpenAPI Diff and Breaking Change Analyzer

Compare old and new OpenAPI 3.x contracts with conservative compatibility classifications.

OpenAPI Test Matrix Generator

Turn declared OpenAPI constraints into traceable QA test ideas.

HTTP Header Analyzer

Parse a raw header block and redact a documented set of common credential-bearing fields.

JSONPath Tester

Select JSON values with bounded JSONPath expressions and visible result paths.

XML Formatter and Validator

Validate XML syntax and format element-only structures locally.

CSV and TSV Viewer

Preview delimited files with quoted-cell parsing, counts, search, and capped rendering.

GraphQL Operation Analyzer

Inventory GraphQL operations, variables, root fields, fragments, and QA findings.

HAR Viewer and Analyzer

Summarize a local HAR by hosts, methods, statuses, failures, timing, and MIME.

Tool categories

UUID

4 browser-based tools

JSON

12 browser-based tools

Encoding

3 browser-based tools

Time

3 browser-based tools

Hashing

3 browser-based tools

URL

4 browser-based tools

Security

3 browser-based tools

Diagram

1 browser-based tools

YAML

4 browser-based tools

API

6 browser-based tools

QA

7 browser-based tools

HTTP

4 browser-based tools

Authentication

1 browser-based tools

XML

3 browser-based tools

Structured Data

2 browser-based tools

GraphQL

2 browser-based tools

Network

5 browser-based tools

API, QA and Developer Tools Directory | DevPouch