Free Online Tools for Developers, Designers & Creators | Oh My Utils
Free online utilities for developers, designers, and creators
No sign-up, no installation — just open and use. All processing happens in your browser, so your data never leaves your device. From encoding and formatting to color palettes, we've got you covered.
100% Client-sideYour data stays in your browser. Nothing is sent to any server.
Lightning FastStatic build with zero loading delays.
Simple UIClean, distraction-free interface.
Dark ModeEasy on your eyes, day or night.
Shareable URLsShare your settings via URL. Others see exactly what you see.
6 LanguagesAvailable in English, 한국어, Español, हिन्दी, 日本語, 中文.
Featured Tools
JSON Formatter & Validator - Beautify JSON Online
Format, beautify, validate, and minify JSON data with syntax highlighting. Fix JSON errors instantly — 100% client-side, no data sent to server.
SQL Formatter & Beautifier - Format SQL Queries Online
Format, beautify, and minify SQL queries with syntax highlighting. Supports MySQL, PostgreSQL, SQLite, T-SQL, and PL/SQL dialects.
Code Minifier - Minify JavaScript, CSS & HTML Online
Minify JavaScript, CSS, and HTML code to reduce file size instantly. See compression ratio and savings — 100% client-side, no upload required.
SVG to JSX Converter - Convert SVG to React Component Online
Convert SVG markup to React JSX, TSX, or React Native components instantly. Optimize SVG attributes and generate copy-ready React code.
JSON Tree Viewer - Visualize JSON Data Interactively Online
Visualize JSON as an interactive tree structure. Expand, collapse, search nodes, and copy JSON paths — 100% client-side, no data sent to server.
XML Formatter & Validator - Beautify XML Online
Format, validate, and minify XML with syntax highlighting and tree view. Fix XML errors and convert between formatted and minified output.
JSON to TypeScript - Generate Interfaces & Types Online
Paste JSON and instantly generate TypeScript interfaces, types, and enums. Convert API responses to type-safe code — 100% in your browser.
JSON to Go Struct - Generate Go Types Online
Paste JSON and instantly generate Go struct definitions with proper naming, json tags, and type inference — 100% in your browser.
JSON to Python - Generate Dataclasses & Pydantic Models Online
Convert JSON to Python dataclasses, Pydantic BaseModel, or TypedDict with type inference, snake_case conversion, and date detection — 100% in your browser.
JSON to SQL - Generate CREATE TABLE & INSERT Statements Online
Convert JSON data to SQL CREATE TABLE and INSERT statements for MySQL, PostgreSQL, SQLite, and SQL Server — 100% in your browser.
JSON to CSV Converter - Convert JSON Arrays to CSV Online
Convert between JSON arrays and CSV/TSV formats with nested object flattening. Preview data in table format and customize delimiters.
JSON Schema Generator - Generate Schema from JSON Data Online
Generate JSON Schema from JSON data for API validation, documentation, and code generation. Supports Draft-04, Draft-07, and 2020-12 — 100% client-side, no data sent to server.
JSONPath Tester - Evaluate JSONPath Expressions Online
Test and evaluate JSONPath expressions against JSON data in real-time. Supports filters, recursive descent, array slicing, and more — 100% client-side, no data sent to server.
TOML Formatter & Validator - Format TOML Online
Format, validate, and convert TOML configuration files with syntax highlighting and tree view. Convert between TOML and JSON — 100% client-side, your data never leaves your browser.
YAML Formatter & Validator - Format, Minify YAML Online
Format, validate, and minify YAML configuration files with syntax highlighting and tree view. Supports Kubernetes manifests, Docker Compose, GitHub Actions — 100% client-side, your data never leaves your browser.
Curl to Code Converter - Convert cURL to Python, JavaScript, Go & More
Convert curl commands to code in JavaScript, Python, Go, Java, PHP, Ruby, C#, Rust, Swift, Kotlin, Dart, and PowerShell. 100% client-side — your API keys and tokens never leave your browser.
Base64 Encode & Decode - Text and File Encoding Online
Encode text or files to Base64 and decode Base64 strings instantly in your browser. Supports image-to-data-URI conversion — no data uploaded.
URL Encoder & Decoder - Encode Query Strings Online
Encode or decode URLs, query parameters, and special characters instantly. Parse URL components and convert between encoded and decoded formats.
HTML Encoder & Decoder - Escape HTML Entities Online
Encode special characters to HTML entities or decode HTML entities back to text. Prevent XSS vulnerabilities — 100% client-side processing.
String Escape & Unescape - Multi-Format Escaper Online
Escape and unescape strings for JSON, HTML, URL, JavaScript, SQL, XML, CSV, and RegEx formats. Convert special characters instantly — 100% client-side, no data sent to server.
GZIP Compress & Decompress - Base64 GZIP Encoder Online
Compress and decompress text or files using GZIP with Base64 output. View compression statistics, download .gz files — 100% client-side, no data sent to server.
UUID Generator - Generate UUID v4 & v7 Online
Generate random UUID v4 or time-ordered UUID v7 instantly. Bulk generate, validate, and copy UUIDs with one click — free online GUID generator.
ULID Generator - Generate Sortable Unique IDs Online
Generate ULIDs, extract timestamps, and convert between ULID and UUID formats. Monotonic generation for strict ordering — 100% client-side, no data sent to server.
Hash Generator - MD5, SHA-256 & SHA-512 Online
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files. Create HMAC hashes and verify checksums — 100% in your browser.
JWT Decoder - Decode JSON Web Tokens Online
Decode and inspect JWT header, payload, and signature instantly. Verify token expiration and claims — no data sent to server, 100% client-side.
Chmod Calculator - Unix File Permission Calculator Online
Calculate Linux/Unix file permissions with an interactive matrix. Convert between octal (755, 644) and symbolic (rwxr-xr-x) chmod formats.
Certificate Decoder - Decode X.509 PEM Certificates Online
Decode and inspect X.509 PEM certificates. View subject, issuer, validity, extensions, SANs, and fingerprints — 100% client-side, no data sent to server.
RSA Key Pair Generator - RSA & Ed25519 Online
Generate RSA (2048/4096-bit) and Ed25519 key pairs in your browser. Export as PEM or JWK format — 100% client-side, no server involved.
Bcrypt Hash Generator - Generate & Verify Bcrypt Hashes Online
Generate bcrypt password hashes with configurable cost factor and verify plaintext against existing bcrypt hashes. 100% client-side, your passwords never leave your browser.
TOTP Generator - Time-Based One-Time Password Tool Online
Generate and verify TOTP codes for 2FA testing. Create secrets, QR codes, and otpauth:// URIs. RFC 6238 compliant — 100% client-side, secret keys never leave your browser.
Regex Tester - Test Regular Expressions Online
Test and debug regular expressions with real-time matching, capture groups, and syntax highlighting. Includes common patterns library and regex cheat sheet.
Diff Checker - Compare Text & Find Differences Online
Compare two texts side by side and highlight differences line by line. Supports unified and split view modes with character-level diff highlighting.
Text Counter - Character, Word & Sentence Counter Online
Count characters, words, sentences, and paragraphs instantly. Check text length for Twitter, Instagram, and YouTube limits — free online character counter.
Byte Counter - String Byte Size Calculator Online
Calculate the byte size of strings in UTF-8, UTF-16, ASCII, ISO-8859-1, and Base64 encodings. Check against common size limits — 100% client-side, no data sent to server.
Markdown Editor - Live Preview & HTML Export Online
Write Markdown and see rendered HTML output in real time. Supports GitHub Flavored Markdown (GFM), tables, code blocks, and syntax highlighting.
Lorem Ipsum Generator - Placeholder Text for Design Online
Generate Lorem Ipsum placeholder text in paragraphs, sentences, or words. Perfect for web design mockups, wireframes, and development testing.
Text Case Converter - camelCase, snake_case & More Online
Convert text between camelCase, snake_case, PascalCase, kebab-case, CONSTANT_CASE, Title Case, and more. Transform variable names and text instantly.
List Comparer - Compare Two Lists & Find Differences
Compare two lists to find unique items, duplicates, intersections, and unions using set operations — 100% client-side, no data sent to server.
Markdown Table Generator - Create & Edit Tables Visually Online
Create and edit Markdown tables with a visual grid editor. Set column alignment, import CSV/Markdown, and get real-time GFM output — 100% client-side, no data sent to server.
Unix Timestamp Converter - Epoch Time to Date Online
Convert Unix timestamps to human-readable dates and dates to epoch time. Supports milliseconds, timezone conversion, and batch processing.
Timezone Converter - Compare World Times & DST Online
Convert and compare times across multiple timezones with automatic DST adjustment. World clock with drag-to-select time range.
Cron Expression Parser & Builder - Crontab Guru Alternative
Parse, explain, and build cron expressions visually. See next execution times, get human-readable descriptions, and validate crontab syntax online.
Date Calculator - Days Between Dates, Age & Business Days
Calculate date differences, add/subtract durations, count business days, and determine age. All processing happens in your browser — no data sent to any server.
QR Code Generator - Create Custom QR Codes Online
Generate QR codes for URLs, text, WiFi, vCard contacts, and email. Customize colors, add logos, choose dot styles, and download as PNG or SVG.
Password Generator - Strong Random Password & Passphrase Online
Generate strong, secure random passwords and memorable passphrases. Customize length, characters, and complexity — 100% client-side, nothing stored.
Fake Data Generator - Test Data for Development Online
Generate realistic test data including names, emails, addresses, phone numbers, and more. Export as JSON or CSV for development and testing.
Barcode Generator - Create EAN-13, UPC-A, Code 128 Barcodes Online
Generate 1D barcodes in EAN-13, UPC-A, Code 128, Code 39, ITF-14, and more formats. Customize colors, size, and download as SVG or PNG — 100% client-side, no data sent to server.
ASCII Art Generator - Text to ASCII Art Banner Online
Convert text to ASCII art banners using 25 FIGlet fonts. Add comment wrappers for code, preview all fonts at once — 100% client-side, your text never leaves your browser.
Color Converter - HEX to RGB, HSL & HSV Online
Convert colors between HEX, RGB, HSL, and HSV formats with live preview. Pick colors visually and copy CSS color codes — free color code converter.
Color Palette Generator - Create Color Schemes Online
Create harmonious color palettes using color theory. Generate complementary, analogous, triadic, and split-complementary schemes with interactive color wheel.
Color Shades Generator - Tints, Shades & Tones from Any Color Online
Generate tints, shades, and tones from a single base color. Export as CSS variables, Tailwind config, JSON, or SCSS — 100% client-side.
Color Blindness Simulator - Test Color Accessibility Online
Simulate how colors appear to people with protanopia, deuteranopia, and tritanopia. Check WCAG contrast ratios for accessible web design.
WCAG Color Contrast Checker - Check Color Accessibility Online
Check color contrast ratios for WCAG 2.1 AA and AAA compliance. Get instant pass/fail results for normal text, large text, and UI components — 100% client-side.
Color Mixer - Blend & Mix Colors Online
Mix two or more colors together at adjustable ratios in RGB or HSL color space. Preview gradient steps and copy results — 100% client-side, no data sent to server.
CSS Gradient Generator - Create Linear & Radial Gradients Online
Create beautiful CSS gradients with live preview. Generate linear and radial gradients, copy CSS code, or export as Tailwind classes.
CSS Box Shadow Generator - Create Shadows Visually Online
Design CSS box shadows with visual controls and live preview. Create layered shadows, neumorphism effects, and copy ready-to-use CSS code.
CSS Text Shadow Generator - Create Text Effects Online
Design CSS text shadows with visual controls and live preview. Create neon glow, 3D, emboss, fire, and outline text effects with multiple shadow layers.
CSS Clip-Path Generator - Create Shapes Visually Online
Create CSS clip-path shapes with a visual drag-and-drop editor. Generate polygon, circle, ellipse, and inset clip paths with live preview.
CSS Border Radius Generator - Round Corners Visually Online
Create CSS border-radius with visual controls and live preview. Design rounded corners, pill shapes, and organic blobs — copy ready-to-use CSS.
CSS Flexbox Generator - Build Flex Layouts Visually Online
Create CSS Flexbox layouts with visual controls. Adjust direction, alignment, wrapping, and gap with live preview — generate clean CSS code.
CSS Grid Generator - Visual Grid Layout Builder Online
Create CSS Grid layouts visually with real-time preview. Define columns, rows, gaps, alignment, grid areas, and item placement — 100% client-side, no data sent to server.
CSS Loader Generator - Spinner & Loading Animations Online
Create pure CSS loading animations with real-time preview and customization
OG Meta Tag Generator - Open Graph & Twitter Card Preview
Generate Open Graph and Twitter Card meta tags with visual previews. See how your page looks when shared on Facebook, X (Twitter), and LinkedIn.
CSS Scrollbar Generator - Custom Scrollbar Styles Online
Design custom CSS scrollbar styles with visual controls and live preview. Generate WebKit and standard scrollbar CSS code instantly — 100% client-side, no data sent to server.
React Native Shadow Generator - iOS & Android Shadow Styles Online
Generate cross-platform shadow styles for React Native with live dual-platform preview. Supports iOS shadowProps, Android elevation, and boxShadow (RN 0.76+) — 100% client-side.
SVG Blob Generator - Create Organic Blob Shapes Online
Create random organic SVG blob shapes for modern web design
SVG Pattern Generator - Create Seamless Background Patterns Online
Generate custom seamless SVG background patterns with real-time preview. Adjust scale, rotation, opacity, spacing, and stroke — export as SVG, CSS, or PNG. 100% client-side, no data sent to server.
SVG Optimizer - Optimize & Minify SVG Files Online
Optimize, minify, and compress SVG files by removing metadata, optimizing paths, and cleaning up redundant code. SVGO-powered, 100% client-side — no data sent to server.
Image Compressor - Compress PNG, JPG & WebP Online
Compress images while maintaining quality. Reduce PNG, JPG, and WebP file sizes with before/after comparison — no upload, 100% in your browser.
Code to Image - Turn Code Snippets Into Beautiful Images
Convert code snippets into shareable images with syntax highlighting. Choose from custom themes, fonts, and backgrounds — Carbon alternative.
Image Color Extractor - Extract Palette from Image Online
Extract dominant colors from any image and generate color palettes. Get HEX, RGB, and HSL values — 100% client-side, no image uploaded.
Image to Base64 Converter - Encode & Decode Images Online
Convert images to Base64 strings or decode Base64 back to images. Supports PNG, JPG, SVG, GIF, and WebP. 100% client-side processing.
Image Resizer - Resize Images by Dimensions, Percentage & Presets Online
Resize images to exact dimensions, scale by percentage, or use social media presets. Convert formats, control quality — 100% client-side, no upload to server.
Image Cropper - Crop & Rotate Images Online
Crop, rotate, flip, and convert images with preset aspect ratios for social media. 100% client-side — no images uploaded to any server.
SVG to PNG Converter - Convert SVG to PNG/JPEG Online
Convert SVG files or code to high-quality PNG/JPEG images with customizable dimensions, scale, and background. 100% client-side, no upload required.
Image Format Converter - Convert PNG, JPG, WebP & AVIF Online
Convert images between PNG, JPG, WebP, and AVIF formats entirely in your browser. Batch conversion, quality control, and file size comparison — no upload required.
Number Base Converter - Binary, Octal, Decimal & Hex Online
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Interactive bit visualization and bitwise operation calculator.
Aspect Ratio Calculator - Image & Video Size Calculator Online
Calculate aspect ratios for images and videos. Resize while maintaining proportions with common presets (16:9, 4:3, 1:1) and responsive dimensions.
Math Expression Calculator - Evaluate Formulas Online
Evaluate mathematical expressions with trigonometric, logarithmic functions, variables, and unit conversions. 100% client-side — no data sent to server.
IP Subnet Calculator - IPv4 & IPv6 CIDR Calculator Online
Calculate subnet masks, network addresses, broadcast addresses, and IP ranges for IPv4 and IPv6. Free online CIDR calculator — 100% client-side, no data sent to server.
Semver Calculator - Parse, Compare & Test Semantic Versions Online
Parse, compare, sort, and test semantic versioning strings against npm-style ranges. Supports caret, tilde, wildcards, and OR ranges — 100% client-side, no data sent to server.
HTTP Status Codes Reference - Complete HTTP Response Code List Online
Search, filter, and copy all HTTP status codes (1xx-5xx) with descriptions, use cases, and response examples. Interactive reference — 100% client-side, no data sent to server.
Keyboard Event Codes - JavaScript Key Event Viewer Online
Press any key to see its JavaScript keyboard event properties in real-time. View event.key, event.code, keyCode, modifier states, and more — 100% client-side, no data sent to server.
Font Pair Finder - Google Fonts Pairing Tool Online
Discover perfect Google Fonts combinations with live preview across multiple layouts. Generate ready-to-use CSS code — 100% client-side, no data sent to server.
Mermaid Diagram Editor - Create Flowcharts & Diagrams Online
Create flowcharts, sequence diagrams, ER diagrams, and 20+ diagram types with Mermaid.js live preview. Export as SVG/PNG — 100% client-side, no data sent to server.
ASCII Diagram Editor - Draw Text Diagrams Online
Draw boxes, arrows, and lines as plain ASCII or Unicode text for code comments, documentation, and README files — 100% client-side, no data sent to server.
Unit Converter - Length, Weight, Temperature & Data Size Online
Convert between length, weight, temperature, data size, speed, time, area, and volume units instantly. Binary vs decimal data size toggle — 100% client-side, no data sent to server.