92 browser-based utilities
Tools
Search and filter the full KalpLabs toolbox across API debugging, JSON workflows, DevOps setup, QA checks, security, data conversion, and more.
Accessibility Checker
Run axe-core checks against pasted HTML and review WCAG violations without leaving the browser.
API Contract Tester
Validate OpenAPI contracts and catch missing request or response definitions before release.
API Mock Server Generator
Draft mock endpoint shapes from schemas so teams can stand up test doubles faster.
API Request Builder
Build and send HTTP requests with headers, params, auth, and body directly in the browser.
API Response Comparator
Compare two API payloads and inspect added, removed, and changed values side by side.
API Scenario Builder
Chain API requests with shared variables, assertions, and step-by-step execution logs.
Assertion Generator
Generate assertion snippets from API responses to speed up automated test authoring.
Base64 / JWT Playground
Encode and decode Base64 strings while inspecting JWT claims, headers, and expiry values.
Brotli Compressor / Decompressor
Compress or decompress text with Brotli to debug payload transport and fixture handling.
Bug Report Helper
Build structured bug reports with repro steps, environment notes, and expected versus actual output.
CI/CD Pipeline Visualizer
Parse pipeline definitions and visualize stages, jobs, and dependencies before merging changes.
Cloud IAM Policy Validator
Review IAM policy JSON for risky wildcards, public principals, and least-privilege issues.
Colour Contrast Checker
Check WCAG contrast ratios for text and UI colours, then generate passing alternatives.
Colour Format Converter
Convert HEX, RGB, RGBA, HSL, and HSV values while checking WCAG contrast ratios.
Concurrency Simulator
Estimate concurrency pressure, utilization, and bottleneck risk from traffic and response-time inputs.
Cron Expression Generator
Build and validate cron schedules with human-readable summaries for jobs and pipelines.
Crypto Key Generator
Generate asymmetric keys, symmetric keys, and random secrets with the browser Web Crypto API.
CSS Gradient Generator
Design linear and radial gradients, then copy CSS or Tailwind classes instantly.
CSS Specificity Calculator
Calculate selector weight, compare competing selectors, and inspect exactly why one wins.
CSS Unit Converter
Convert px, rem, em, viewport, percent, and print units using realistic layout context values.
CSV / JSON Converter
Convert CSV to JSON and JSON arrays to CSV with delimiter detection and nested-data handling.
cURL / RestAssured Converter
Convert curl commands into RestAssured snippets and back for API automation workflows.
cURL Converter
Convert curl commands into client snippets for debugging, docs, and test setup.
Data Generator
Generate realistic names, emails, IDs, and fixture values for tests and mock payloads.
Deflate Raw Utility
Compress or decompress raw deflate payloads for transport debugging and file inspection.
Docker Compose Validator
Validate docker-compose files for missing images, bad dependencies, and port conflicts.
Dockerfile Generator
Generate optimized Dockerfiles with multistage build and health-check options.
Dynamic Mock Server
Create configurable mock APIs with conditional responses and live request logs.
Environment Utility
Inspect and format .env-style variables locally before sharing or injecting them into workflows.
Environment Variable Manager
Create named environments locally and inject active values into request-building tools.
Git Conflict Visual Resolver
Resolve merge conflicts block by block and export a clean merged file without leaving the browser.
Git Helper
Generate practical Git command sequences for branching, rebasing, recovery, and releases.
GitHub Actions YAML Generator
Generate CI workflow YAML for common language stacks and deployment steps.
GraphQL Playground
Run GraphQL queries with variables, headers, schema introspection, and local history.
GraphQL Query Tester
Compose and validate GraphQL queries with variables when you need a lightweight runner.
Gzip Utility
Compress or decompress text with Gzip to debug API payload handling and transport issues.
HAR File Analyzer
Analyze HAR files for latency, failures, domains, and request hotspots in one pass.
Hash Generator
Generate MD5, SHA1, SHA256, and SHA512 hashes from text without leaving the browser.
Header Builder
Compose reusable HTTP header sets for auth, tracing, and custom API requests.
Hex Encoder / Decoder
Convert plain text to hex and decode hexadecimal values back into readable strings.
HMAC Signature Generator
Generate and verify HMAC SHA256 and SHA512 signatures for webhook and auth flows.
HTML Tools Toolkit
Format, minify, escape, preview, and validate HTML from one browser-based workspace.
HTTP Header Analyser
Parse raw response headers into readable security, caching, content, and CORS insights.
HTTP Status Code Reference
Search HTTP codes with descriptions, common causes, typical fixes, and framework behavior.
Incident Timeline Builder
Turn timestamped events into a clean incident chronology with detection and resolution metrics.
JSON Diff Checker
Compare JSON payloads and detect added, removed, and changed fields for regression testing.
JSON Schema Validator
Validate JSON payloads against schemas and identify precise failing paths and types.
JSON Test Case Generator
Generate QA-ready test scenarios from JSON payload structure and field combinations.
JSON to Code Generator
Generate typed models from JSON for TypeScript, Python, Java, Go, C#, Kotlin, and Rust.
JSON Utilities
Format, validate, diff, search, and query JSON payloads in one editor-first workspace.
JWT Decoder
Decode and inspect JWT headers, claims, and timing fields for auth debugging.
Kubernetes YAML Validator + Linter
Validate Kubernetes manifests, flag deprecated APIs, and catch lint or security issues.
Load Test Result Analyzer
Analyze JMeter CSV and k6 JSON results for latency, throughput, and error patterns.
Lorem JSON Generator
Generate realistic user, order, and product JSON payloads for mocks and fixtures.
Markdown Preview & Formatter
Format Markdown, preview GitHub-flavoured output, and export HTML or print-ready documents.
Meta Tag Previewer
Preview titles, descriptions, Open Graph tags, and Twitter cards across search and social surfaces.
Multi-Hash Generator & Verifier
Generate MD5 and SHA hashes, then verify expected signatures against input values.
Number Base Converter
Convert numbers between decimal, binary, octal, hex, and custom bases with bit-level helpers.
OAuth 2.0 Flow Debugger
Generate PKCE values, build OAuth URLs, and inspect token requests and decoded token payloads.
Online Notepad
Write, format, autosave, copy, and export rich text or code without leaving the browser.
OpenAPI / Swagger Viewer
Preview and navigate OpenAPI or Swagger definitions quickly when you just need a fast reader.
OpenAPI / Swagger Visualizer
Parse OpenAPI specs and explore grouped endpoints, parameters, and schemas visually.
Password Strength Checker
Score password strength, estimate entropy, and surface risky or repeated patterns.
Postman Collection Importer
Import Postman collections, run requests locally, and export them as curl commands.
Quoted-Printable Encoder / Decoder
Encode and decode quoted-printable content for MIME, email, and legacy API payloads.
Random JSON Generator
Generate random nested JSON payloads to test parsers, validators, and API robustness.
Regex Utility
Test, debug, and validate regular expressions against sample text in real time.
Request Inspector
Generate a temporary endpoint and capture incoming requests with headers, query, and body.
Response Time Percentile Calculator
Calculate latency percentiles from raw timings or CSV data for performance reviews.
Resume Skill Analyzer
Extract QA and DevOps skill signals from resume text for fast screening and review.
Screen Size / Breakpoints
Check viewport dimensions and active Tailwind-style breakpoints for responsive testing.
SLA Calculator
Translate uptime targets into practical downtime budgets for SLO and reliability reviews.
SQL Formatter
Format SQL queries for readable debugging, code review, and test data validation.
SSL / TLS Certificate Inspector
Inspect certificate issuer, validity, SANs, protocol, and cipher details for a domain.
String Size Utility
Measure string length and byte size to validate payload limits and encoding assumptions.
String Utility
Escape, encode, transform, and inspect strings used in test data and API payloads.
Test Case Generator from OpenAPI
Generate deterministic happy-path, auth, boundary, and validation cases from OpenAPI specs.
Test Coverage Heatmap
Parse LCOV, Istanbul, Cobertura, and Go coverage reports into a browsable file heatmap.
Timestamp Converter
Convert Unix timestamps and ISO dates while checking timezone and log-friendly formats.
Timestamp Converter
Convert Unix timestamps to ISO and readable date formats for logs, metrics, and test reports.
Timezone Converter & World Clock
Convert datetimes across IANA timezones, monitor world clocks, and inspect overlap windows.
Universal Converter
Convert JSON, YAML, XML, CSV, and plain text between common engineering formats.
URL Builder & Parser
Break URLs into editable parts, manage query params, and rebuild encoded links.
URL Encoder / Decoder
Encode and decode URL-safe strings when debugging query params and redirect values.
UUID Generator
Generate UUID values for request IDs, test data, mocks, and idempotency keys.
Webhook Payload Builder
Edit GitHub, Stripe, Slack, Jira, and PagerDuty webhook payload templates locally.
WebSocket Tester
Connect to WebSocket endpoints, send messages, and inspect live frame logs in real time.
XML to JSON Converter
Convert XML payloads into JSON output while preserving nested structure where possible.
XML Utilities
Format, validate, diff, search, and query XML payloads directly in the browser.
XPath / CSS Selector Tester
Evaluate XPath and CSS selectors against HTML snippets and inspect matched nodes quickly.
YAML Validator
Validate YAML safely, surface syntax issues, and convert valid content into JSON.
Zlib Utility
Compress or decompress text using zlib for transport debugging and test fixture prep.