✈️
Works 100% offline — try it yourself
Toggle Airplane Mode → use any tool. Zero network requests, 100% private.
NETWORK ON

Developer & creator tools that never touch a server.

Fast, ad-free, private micro-tools powered by client-side WebAssembly & JavaScript. Your confidential tokens, PDF files, colors, and code never leave your device.

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⭐ NEW · AI AGENTS Offline PWA

Claude Code & Codex Session Log Viewer

Inspect, search, and analyze multi-turn Claude Code & Codex JSONL transcripts, tool commands, projects, and git branches in your browser with 1-click folder refresh & offline PWA download.

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MongoDB

MongoDB Query Formatter

Format, inspect, and beautify MongoDB find() and aggregate pipelines into clean, indented JSON.

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GraphQL

GraphQL Query & Schema Prettifier

Prettify queries, mutations, subscriptions, and extract inline GraphQL variables into clean JSON.

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cURL to Code

cURL to Fetch, Python & Axios

Convert raw cURL terminal commands into JavaScript fetch(), Python requests, Axios, and Swift URLSession.

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Docker

Docker Command & Compose Builder

Visually build docker run commands and convert them to production Docker Compose YAML files.

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AWS Cloud

AWS ARN Deconstructor

Deconstruct Amazon Resource Names into Partition, Service, Region, Account ID, and Resource links.

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K8s & DevOps

K8s & Terraform Manifest Inspector

Inspect Kubernetes YAML and Terraform blocks to extract container images, ports, and namespaces.

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Git

Git Workflow & Command Builder

Transform repo URLs into clone, remote upstream, submodule, and branch initialization snippets.

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⭐ UNLIMITED

Realistic Mock Data Generator

Generate unlimited rows of fake names, emails, UUIDs, addresses, and salaries into JSON, CSV, or SQL with zero row caps.

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⭐ WEB CRYPTO

Webhook Signature Verifier

Verify Stripe, GitHub, Shopify, and Slack webhook HMAC signatures offline in browser memory. No public endpoints needed.

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⭐ 100% PRIVATE

SSL Certificate (PEM/CRT) Decoder

Inspect X.509 metadata, SAN domains, issuer, and expiration dates 100% offline without uploading private certs.

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Crypto

JWK ⇄ PEM Key Converter

Convert JSON Web Keys (JWK) to PEM format and vice versa using native Web Crypto API.

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Licensing

License Key Generator & Validator

Generate cryptographic serial keys with tamper checksums for macOS apps and SaaS licensing.

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⭐ SUPER TOOL

OpenAPI / Postman ⇄ cURL Generator

Parse OpenAPI 3.0 / Swagger JSON specs and Postman collections into executable cURL commands.

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DevOps

Terraform HCL ⇄ JSON Converter

Convert HashiCorp HCL terraform configuration blocks into JSON and YAML for pipeline validation.

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Env

.env ⇄ JSON / YAML Converter

Convert files into JSON and YAML with automatic key validation and optional secret masking.

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Excel

Excel Formula Locale Translator

Translate formulas across English, German, French, Spanish, and Italian locales with argument separator mapping.

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⭐ RFC 6902

JSON Patch (RFC 6902) Generator

Generate and apply standard RFC 6902 JSON Patch arrays (add, remove, replace, move) in real time.

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A11Y

WCAG Color Contrast & Palette Studio

Calculate WCAG 2.1 AA/AAA compliance ratios for text colors with 1-click accessibility adjustments.

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Data

CSV Data Profiler & PII Inspector

Profile CSV datasets: analyze column types, null counts, uniqueness, and flag sensitive PII columns.

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⭐ SUPER TOOL

Convert to Markdown (Universal Engine)

Transform PDF, DOCX, HTML, Notion, Google Docs, JSON, XML, CSV, and RTF into clean GitHub-flavored Markdown. 100% offline.

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PDF

Convert PDF to Markdown

Extract headings, text blocks, and tables from PDF documents into clean, structured Markdown offline in your browser.

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Document

Convert Word DOCX to Markdown

Convert Microsoft Word documents, lists, bold/italics, and tables into clean GitHub-flavored Markdown.

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Web

Convert HTML to Markdown

Strip messy span tags and inline styles from raw HTML markup to produce beautiful, clean Markdown.

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Notion

Convert Notion to Markdown

Sanitize and convert copied Notion blocks, callouts, and bullet lists into clean, portable Markdown.

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GDocs

Convert Google Docs to Markdown

Paste directly from Google Docs to strip proprietary span styles and GUID tags into spotless Markdown.

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XML

Convert XML to Markdown

Transform XML documents, RSS feeds, and nested tag structures into structured Markdown outlines and tables.

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JSON

Convert JSON to Markdown

Convert JSON arrays and nested key-value objects into formatted Markdown tables and bullet lists.

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RTF

Convert RTF to Markdown

Convert Rich Text Format (.rtf) files and macOS TextEdit documents into clean Markdown.

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Clipboard

Convert Paste to Markdown

Paste formatted content from any web page or app to instantly standardize it into clean Markdown.

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Article

Convert Webpage to Markdown

Extract core article content, headings, and code blocks from webpage HTML into clean Markdown without ads.

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⭐ SUPER TOOL

Universal Data Converter (OmniFormat)

Paste JSON, YAML, XML, or CSV to simultaneously generate and synchronize all 4 formats in one screen. 100% offline.

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⭐ SUPER TOOL

Universal SQL Query Converter

Convert any SQL query into SELECT, INSERT INTO, UPDATE, and DELETE statements simultaneously. 100% offline.

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⭐ FLAGSHIP

PasteGuard — AI Prompt Secret Sanitizer

Scans and replaces 60+ API key types (AWS, OpenAI, Stripe, DB URLs, PII) with synthetic mock data for AI prompts.

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⭐ FLAGSHIP

RegexLens — Visual Flowchart & Explainer

Visualize regex patterns as interactive railroad diagrams, explain syntax in plain English, and detect ReDoS risks.

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⭐ FLAGSHIP

SchemaForge — Multi-Language Model Generator

Generate Swift Codable, TypeScript + Zod, Python Pydantic v2, Rust Serde, and Go structs simultaneously from JSON.

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Data

JSON String Unescaper

Unescape serialized CloudWatch logs and stringified JSON into clean, formatted JSON objects.

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DevOps

JSON to YAML Converter

Bidirectional conversion between JSON and clean 2-space indented YAML configuration files.

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Database

SQL DDL to JSON Mock Data

Convert CREATE TABLE schemas and SQL statements into realistic JSON mock arrays for test fixtures.

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Popular

PDF Page Remover

Visually select and delete unwanted pages from confidential PDFs 100% offline in your browser.

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Popular

PDF Merger & Combiner

Combine multiple PDF files into one consolidated document with custom order. 100% private.

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Security

Password Protect PDF

Encrypt and lock sensitive PDF files with password protection directly in your browser. 100% private.

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New

PDF to JPG & PNG Converter

Convert PDF pages to crisp high-DPI JPG or PNG images directly in your browser. 100% private.

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New

JPG & PNG to PDF Maker

Convert and combine multiple JPG, PNG, and WebP images into a single PDF document. 100% offline.

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Developer

Regex Tester & Explainer

Test regular expressions with real-time match highlighting and plain-English token breakdowns.

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Developer

cURL to Code Converter

Convert cURL commands to JavaScript Fetch, Axios, Python Requests, Go, and Swift URLSession.

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DevOps

Cron Expression Visualizer

Translate cron schedules into plain English and compute upcoming execution timestamps.

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Developer

Text & Code Diff Checker

Compare two text blocks or code files side-by-side to highlight additions and deletions.

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Designer

Color Studio & Tailwind Matcher

Convert HEX, RGB, HSL, Swift Color(), and match nearest Tailwind CSS 3/4 color classes.

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Designer

SVG Optimizer & JSX Cleaner

Strip bloated metadata from Figma & Illustrator SVGs and convert to clean React JSX.

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Designer

Box-Shadow & Glassmorphism

Design smooth multi-layered ambient shadows and frosted glass blur effects with CSS tokens.

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Designer

Aspect Ratio & Dimensions

Compute proportional width and height scaling for 16:9, 4:3, 1:1, and 9:16 social media assets.

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Creator

Social Media Character Counter

Live word and character counts with visual limit progress bars for X/Twitter, LinkedIn, and SEO.

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Creator

Markdown to Rich Text Copy

Convert Markdown into formatted rich text ready to paste directly into Google Docs and emails.

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Creator

Title & Headline Capitalizer

Automatically capitalize headlines according to AP, Chicago, and APA editorial style rules.

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SEO

Clean URL & SEO Slug Generator

Transform article titles into clean, URL-safe permalinks for blogs and documentation.

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Data

Base64 Image Encoder & Decoder

Convert PNG/JPG images to Base64 Data URI strings or decode Base64 into viewable images.

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Security

JWT Decoder & Inspector

Decodes Header and Payload, inspects claims, checks expiration with live remaining time.

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Data

JSON Formatter & Validator

Pretty-print, minify, validate, and repair malformed JSON syntax directly in your browser.

TS
Codegen

JSON to TypeScript & Zod

Instantly infers types and generates clean TypeScript interfaces and Zod validation schemas.

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Database

SQL Query Prettifier

Formats SQL keywords, aligns clauses, and standardizes indentation for Postgres, MySQL & SQLite.

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Tables

CSV to Markdown Table

Converts comma or tab-delimited spreadsheet data into clean GitHub/Dev.to Markdown tables.

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Privacy

UTM & Tracking Stripper

Removes marketing tracking parameters (utm_*, fbclid, gclid) for clean link sharing.

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New

Semantic JSON Diff

Compare two JSON objects side-by-side. Highlights additions, removals, and changes with key sorting.

⚡ Automate all 22+ transforms natively on macOS with ⌘⇧V

Stop jumping between browser tabs. L2Cache captures your clipboard history and offers these exact transforms with ⌘⇧V — 100% offline, on-device AI.

🍎 Download for Mac — Free