Every Developer & Image Tool You Need.Zero Latency. 100% Private.
Crop, compress, convert, format JSON, decode tokens, and scale social media assets directly on your CPU. Your files and data never touch our servers.
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Image Tools (21)
Image Resizer
Resize PNG, JPG, and WebP images by exact pixel dimensions or percentage while maintaining aspect ratios.
Image Compressor
Reduce file size of JPEG, PNG, and WebP images up to 85% without noticeable loss in visual clarity.
Image Cropper
Crop images with precision visual handles and standardized aspect ratios (16:9, 4:3, 1:1, or custom).
Image Rotator
Rotate images 90°, 180°, 270°, or fine-tune angles with instant hardware-accelerated preview.
Image Flipper
Mirror photos horizontally or vertically with a single click using in-browser canvas rendering.
Aspect Ratio Calculator
Calculate proportionate width and height dimensions, aspect ratios, and responsive scale ratios.
Image Dimensions Calculator
Calculate print physical dimensions in inches or cm based on DPI/PPI and pixel resolution.
Add Watermark
Apply copyright text or transparent PNG logo watermarks with custom opacity, tile mode, and position.
Passport Size Maker
Generate standard 2x2 inch and 35x45mm international biometric passport photos ready to print on 4x6 paper.
Image Optimizer
Convert legacy image assets to next-gen WebP and AVIF formats for lightning-fast web performance.
Exif Viewer & Stripper
View embedded camera metadata, exposure specs, and GPS coordinates, or strip EXIF data for privacy.
Color Picker from Image
Sample precise pixel colors with magnifying loupe and auto-extract dominant harmonic palettes.
Image Converter
Batch convert pictures between PNG, JPG, WebP, GIF, SVG, BMP, and ICO with zero quality degradation.
YouTube Specs & Resizer
Preset resizer for YouTube Banners (2560x1440), Video Thumbnails (1280x720), and Channel Icons (800x800).
Instagram Specs & Resizer
Fit photos perfectly to Instagram Square (1080x1080), Portrait (1080x1350), Stories & Reels (1080x1920).
Facebook Specs & Resizer
Scale photos for Facebook Cover (820x312), Link Posts (1200x630), and Event Headers (1920x1005).
X (Twitter) Specs & Resizer
Format images for X Header Banner (1500x500), In-Stream Photos (1600x900), and Avatar (400x400).
LinkedIn Specs & Resizer
Format professional Company Banners (1128x191), Profile Covers (1584x396), and Post Images (1200x627).
Pinterest Specs & Resizer
Optimize high-converting Pinterest Standard Pins (1000x1500) with 2:3 ratio and Board Covers (600x600).
TikTok Specs & Resizer
Resize for 9:16 vertical video thumbnails (1080x1920) and high-resolution profile avatars (200x200).
WhatsApp Specs & Resizer
Create crisp WhatsApp DP Profile Pictures (500x500), Status Stories (1080x1920), and Sticker Canvases (512x512).
Developer Tools (16)
JSON Formatter
Prettify and indent messy JSON strings with customizable 2/4 spaces or tabs, syntax highlighting, and copy.
JSON Validator
Validate JSON syntax compliance, highlight line-by-line parsing errors, and inspect structural schemas.
JSON Minifier
Strip unnecessary spaces, newlines, and comments to compress JSON payloads for API payloads and bandwidth savings.
Base64 Encoder
Encode plain text, ASCII strings, or binary image files into standard RFC 4648 Base64 strings.
Base64 Decoder
Decode Base64 payloads back to UTF-8 plaintext or reconstruct and download original binary files.
URL Encoder
Encode strings into RFC 3986 percent-encoded format for safe transmission in query parameters and URIs.
URL Decoder
Decode percent-encoded URI strings and complex query parameter payloads back to human-readable text.
UUID Generator
Generate cryptographic RFC 4122 Version 4 and Version 7 UUIDs individually or in bulk with one-click copy.
Timestamp Converter
Convert human-readable calendar dates, ISO-8601 strings, and RFC 2822 timestamps into Unix epoch seconds and ms.
Unix Timestamp Converter
Parse raw Unix epoch timestamps (seconds or milliseconds) into local time, UTC, and relative duration strings.
Regex Tester
Test JavaScript/PCRE regular expressions in real-time with highlighted captures, match indices, and flag toggles.
JWT Decoder
Inspect JSON Web Token headers, payloads, and claims without sending private secrets to any remote server.
HTML Formatter
Format, indent, and organize raw HTML5 code with clean tag nesting, attribute formatting, and tag validation.
CSS Minifier
Minify CSS stylesheets by stripping unnecessary comments, whitespace, and consolidating redundant declarations.
JS Minifier
Quickly minify client JavaScript snippets, stripping comments and space tokens for lean production loading.
Color Converter (HEX ⇄ RGB)
Two-way color conversion between HEX, RGB, RGBA, HSL, and CMYK with copyable CSS code snippets.
Why Developers Choose OmniTools
Traditional utility websites upload your private photos and sensitive JSON payloads to external cloud servers. We rewrote every single tool to execute entirely inside your web browser.
Client-Side Image Suite
Harnessing HTML5 Canvas, OffscreenCanvas, and WebAssembly to compress JPEGs, convert PNGs to WebP, and crop passport photos instantly without uploading megabytes over the internet.
- ✓ Lossless & lossy compression
- ✓ Exif metadata stripping
- ✓ Multi-image batch export
Developer Utility Hub
Format, inspect, and validate your code strings in sub-milliseconds. Inspect JWT payloads and decode sensitive Base64 credentials with complete confidence that nothing is logged.
- ✓ Zero server log risk for tokens
- ✓ RFC 4122 v4 & v7 UUID generation
- ✓ Real-time PCRE regex evaluation
Social Media Precision Resizer
Pre-configured safe-zone canvases for YouTube Banners, Instagram Reels, LinkedIn Covers, TikTok avatars, and X headers. Avoid awkward cropping and blurry compression artifacts.
- ✓ YouTube 2560x1440 & 1280x720 specs
- ✓ Instagram 1080x1350 & 9:16 Reels
- ✓ WhatsApp 500x500 DP & Sticker
Frequently Asked Questions
Learn more about how our browser-based cryptographic and image processing engines work.
Are my images or code snippets uploaded to your server?↓
No. Absolute zero data is uploaded. Every tool runs locally in your browser using HTML5 Canvas, the Web Cryptography API, Web Workers, and WebAssembly. You can disconnect your Wi-Fi after opening the page and every tool will continue functioning with full performance.
Is there a file size limit for image compression and resizing?
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Because all calculations happen on your hardware, there are no artificial server file size limits or queue thresholds. You can process high-resolution DSLR photos (20MB+ and 50+ megapixels) limited solely by your local machine's RAM.
How are social media aspect ratios and resolutions kept accurate?↓
Our social media tools are updated against the latest developer specifications from YouTube, Meta (Instagram, Facebook, WhatsApp), X (Twitter), ByteDance (TikTok), Pinterest, and LinkedIn to ensure accurate safe-zones and prevent mobile cropping.
Is the JWT Decoder safe for production tokens?↓
Yes. Unlike public web debuggers that send token strings over HTTP POST requests, our JWT Decoder parses the Base64URL header and payload directly in client-side JavaScript, never exposing your API tokens or user claims.