A premium, privacy-first suite of offline developer tools designed to run completely sandboxed inside your browser. No signup. No API keys. Zero tracking.
No servers, no tracking, and no database logs. Your keys and JSON code remain entirely on your local machine.
Instant in-browser calculations using highly optimized local JavaScript parser libraries and routines.
Works 100% offline. Ideal for secure corporate intranets, high-speed formatting, or sandbox testing.
Format and clean JSON code
Validate syntax in real time
Convert HTML elements to JSX
Format database SQL queries
Generate RFC v4 UUIDs
Generate high-entropy keys
Encode text to Base64 format
Decode JWT payloads locally
Clean up minified, single-line, or messy JSON into readable, properly indented structure instantly in your browser. Pick your indent style — 2 spaces, 4 spaces, or tabs — and get copy-paste-ready output with syntax errors flagged at the exact line and column. 100% free and fully offline, so even API keys and production payloads never leave your machine.
Paste JSON and get an instant verdict — valid or broken, with the exact line and column of every syntax error. Strict RFC 8259 checking runs entirely in your browser, so API keys and production payloads never leave your machine. Free, no signup.
Strip every unnecessary byte from your JSON — whitespace, indentation, and line breaks gone in one step, with all values byte-identical. Shrink API payloads, config files, and localStorage blobs before they hit the wire. Free, offline, and instant.
Turn a wall of minified JSON into a beautiful, readable tree — syntax-colored, with collapsible objects and arrays so you can drill into exactly the branch you care about. Built for inspecting real API responses, not toy examples. Free and fully offline.
Flatten JSON arrays into spreadsheet-ready CSV in seconds — nested objects become dot-notated columns, arrays are handled sensibly, and the output opens cleanly in Excel and Google Sheets. Perfect for turning API exports into reports. Free, offline, no upload.
Turn CSV spreadsheets into clean JSON arrays instantly — with smart type inference that converts "42" to 42 and "true" to true, custom delimiter support, and headers handled automatically. Ideal for seeding databases and test fixtures from spreadsheet data. Free and offline.
Convert JSON data into well-formed XML documents in one click. Built for the moments you still need XML — legacy SOAP services, enterprise middleware, RSS feeds, and config files that never made the JSON jump. Free, offline, nothing uploaded.
Parse XML documents and convert them into clean, readable JSON instantly. Ideal for taming SOAP responses, RSS feeds, and legacy configs into data your JavaScript can actually work with. Free, offline, private.
Turn tangled single-line SQL into clean, readable statements with uppercase keywords and smart indentation for JOINs, subqueries, and CTEs. Supports MySQL, PostgreSQL, SQLite, Oracle, and standard SQL dialects, so queries format the way your database actually speaks. Free and fully offline — your schema and table names never leave your browser.
Take minified or messy HTML and turn it into clean, properly indented markup. Aligns nested tags, normalizes attribute spacing, and makes view-source output actually readable. Free, offline, runs in your browser.
Untangle minified stylesheets into readable CSS — one rule per line, properties indented, selectors aligned. Perfect for inspecting production CSS or cleaning up generated styles. Free, offline, private.
Make minified or tangled JavaScript readable again — proper indentation, consistent brace placement, and sane line breaks. Handles modern ES6+, TypeScript, and JSX. Free, offline, runs entirely in your browser.
Turn minified, single-line XML into clean, properly indented markup in your browser. Free, offline, and private — built for SOAP responses, Maven POM files, Android layouts, and server config files. Nothing you paste ever leaves your device.
Format, beautify and validate YAML instantly. Fix indentation, catch syntax errors, standardize to 2-space style. Free, offline, private — runs in your browser.
Turn YAML configs into JSON instantly. Free, offline, private — paste a Kubernetes manifest or docker-compose file and get valid JSON. Nothing uploaded, ever.
Convert JSON to clean, readable YAML instantly in your browser. 100% free, works offline, your data never leaves your device. Ideal for Kubernetes, Docker Compose & CI configs.
Convert any HTML snippet into React-ready JSX instantly. class → className, inline styles → objects, comments fixed automatically. Free, offline, private.
Convert JSX components to plain static HTML instantly. Free offline tool for emails, CMS embeds & static pages. className → class handled automatically.
Encode text into Base64 for data URIs, HTTP auth headers, and binary-safe transport. Free and fully offline — everything runs in your browser, so tokens, keys, and payloads never touch a server.
Decode Base64 strings back into readable text instantly. Free, offline, and private — perfect for inspecting data URIs, auth headers, and encoded API payloads without pasting secrets into a random website.
Percent-encode URLs and query parameters so spaces, symbols, and non-Latin text survive transport intact. Free, offline, and browser-based — the safe way to build OAuth callbacks, search URLs, and API query strings.
Turn percent-encoded URLs back into readable text to inspect query parameters, redirect chains, and tracking links. Free, offline, and private — paste suspicious links safely; the tool never fetches or visits them.
Paste any JWT access token and instantly inspect its decoded header, payload claims, and signature segment — expiry timestamps, issuer, audience, and scopes laid out as readable JSON. Decoding happens entirely in your browser, so production tokens carrying real user data are never uploaded anywhere. Free, no signup, works offline.
Generate RFC 4122 version 4 UUIDs instantly — a single ID or up to 100 in bulk — using your browser's cryptographically secure random number generator. Choose lowercase, UPPERCASE, or {braced} formatting to match your database, framework, or .NET convention. Completely free, works offline, and generated IDs are never logged or sent anywhere.
Type any text and get its MD5, SHA-1, and SHA-256 digests computed side by side in real time — no page switching, no retyping. Built for comparing algorithms at a glance, matching whichever checksum format a download page publishes, and learning how digest length maps to each algorithm. Free, offline, your input never leaves the browser.
Compute MD5 checksums — 128-bit digests shown as 32-character hex — from any text instantly in your browser. The right tool when you need to match a published MD5 checksum, work with legacy systems, or generate deterministic identifiers like Gravatar hashes. Free and fully offline; never use MD5 for passwords or anything adversarial.
Generate SHA-1 digests — 160-bit hashes rendered as 40-character hex — from any text, instantly and offline. Indispensable when you're matching git commit hashes, verifying legacy checksums, or integrating with systems that still identify objects by SHA-1. Free, private, no upload.
Compute SHA-256 hashes — 256-bit digests as 64-character hex — from any text, instantly in your browser. The current standard for download verification, API request signing, certificate fingerprints, and blockchain addresses. Free, fully offline, nothing you type ever leaves your device.
Debug regular expressions with live match highlighting, capture-group inspection, and instant syntax error feedback as you type. 100% free, runs fully offline in your browser — your patterns and test data never leave your device. Supports the g, i, m, s, and u flags.
Build correct cron expressions without memorizing field order — pick minutes, hours, days, months, and weekdays from dropdowns and get a valid 5-field crontab line instantly. Every expression comes with a plain-English translation ("At 09:30 on weekdays") so you can verify the schedule before it runs. Free, offline, no signup.
Convert Unix timestamps to human-readable dates and back — paste epoch seconds or milliseconds and get local time, UTC, ISO 8601, and relative times ("2 hours ago") instantly. It auto-detects seconds vs milliseconds, so the classic 10-digit/13-digit mixup is handled for you. Free and offline.
Translate colors between HEX, RGB, HSL, and HSV with a live preview swatch — paste any format (including #fff shorthand, rgba(), and named colors like rebeccapurple) or pick visually, then copy clean CSS one click at a time. Free, offline, built for developers and designers alike.
Turn any hex color code into its red, green, and blue channel values instantly. Handles 3-digit shorthand, 6-digit codes, and 8-digit hex with alpha — free, offline, and nothing you paste ever leaves your browser. Perfect when your design file says #3b82f6 but your code needs rgb().
Convert RGB channel values into compact hex codes like #3b82f6 in one step. Handles RGBA with alpha too, producing 8-digit hex when you need it. Free, offline, private — ideal when your color picker gives you numbers but your stylesheet wants hex.
Translate RGB colors into hue, saturation, and lightness — the way humans actually think about color. Free, offline, and instant. Designers use HSL to build hover states, tints, and harmonious palettes without guessing channel numbers.
Convert hue, saturation, and lightness back into RGB channel values for tools and APIs that only speak RGB. Free, offline, instant — the essential bridge when you design in HSL but ship to canvas, WebGL, or legacy code.
Generate realistic Latin placeholder text for mockups and wireframes — by words, sentences, or paragraphs, with adjustable length and the classic "Lorem ipsum dolor sit amet..." opening. One-click copy or download as .txt. Free, offline, no signup.
Create strong, unpredictable passwords with real cryptographic randomness — not Math.random(). Choose length and character sets, check the entropy readout, and copy. Free, offline, and generated passwords are never stored or transmitted anywhere.
Generate QR codes 100% offline in your browser. URLs, WiFi, vCards, plain text — no account, no tracking, your data never leaves your device.
Generate scannable barcodes in CODE128, EAN-13, UPC-A, and CODE39 — right in your browser, free and offline. Type your product code or serial, pick the format your scanner expects, and download a print-ready image for labels, packaging, or inventory tags.