Developer tools

Password generator

Generate secure, customizable passwords locally in your browser.

UUID generator

Create standards-based UUIDs for development workflows.

Slug generator

Turn a title into a clean URL slug with clear normalization.

JSON formatter

Validate, format, minify and copy JSON without uploading it.

XML formatter

Indent XML for readable inspection and clean handoffs.

HTML formatter

Format HTML markup into a readable, consistently indented structure.

Base64 encoder & decoder

Encode ordinary text or decode Base64 values with clear errors.

Hash generator

Generate SHA hashes locally with the browser cryptography API.

JSON to TypeScript

Infer a readable TypeScript type from sample JSON without uploading the data.

JSON to Zod schema generator

Infer a clean Zod validation schema and TypeScript type from sample JSON locally in your browser.

JWT decoder & expiry visualizer

Decode JWT headers and claims locally, then inspect the exp claim with a live expiry countdown.

Webhook payload simulator

Validate a webhook JSON payload locally and copy a safe cURL request without sending network traffic.

Cron expression humanizer

Translate a five-field cron expression into plain English and calculate its next five run times.

CSV to JSON Schema generator

Infer a draft JSON Schema from a CSV header and sample rows without uploading the data.

Regex tester

Test regular-expression matches and flags directly in the browser.

URL parser

Inspect URL components and query parameters without visiting the link.

CSV to JSON

Turn spreadsheet-shaped CSV into clean JSON with local escaped-quote handling.

Sitemap checker

Inspect pasted sitemap XML for valid locations, duplicates, and last-modified coverage locally.

Link extractor

Extract, classify, and review links from pasted HTML without crawling or visiting a URL.

SERP preview

Design a clear search-result snippet with editable title, description, and display URL.

Google Play ASO analyzer

Audit Google Play listings with ASO scoring, keyword research, competitor benchmarks, and AI recommendations.

ASO keyword density & metadata optimizer

Analyze keyword density, word frequency, and official character counts for Google Play and App Store listings without keyword stuffing.

ASO & PPC keyword permutation generator

Multiply keyword lists, generate permutations, and format match types for Apple Search Ads (ASA), Google Ads, and iOS 100-character keyword fields.

IPv4 CIDR & subnet calculator

Calculate subnet masks, usable IP ranges, wildcard masks, broadcast addresses, and binary bit breakdowns.

JSON to YAML converter

Convert JSON objects and arrays into clean, indented YAML configuration markup locally in your browser.

Offline JWT debugger & inspector

Inspect JWT headers and claims completely offline with a real-time expiry visualizer and zero network tracking.