UD5 Toolkit
Image Blend Mode Tester - Online Overlay Two Photos
Upload two images and apply CSS blend modes (multiply, screen, overlay, etc.). See the result and copy the filter CSS. Pure frontend.
Image Gradient Overlay - Online Add Color Tint
No image loaded
📷 Image Source
🎨 Gradient Type
🌈 Colors
✨ Quick Presets
🎨 Gradient Type
Start
End
📐 Angle: 135°
💧 Overlay Opacity: 60%
135°
60%
🔀 Blend Mode
Frequently Asked Questions
What is a gradient overlay?
A gradient overlay blends a smooth color transition on top of your image. It creates a color tint effect where one shade gradually transitions into another, enhancing the mood and aesthetic of your photo without permanently altering the original.
How do I add a color tint to my image?
Upload your image, choose two colors (or the same color for a solid tint), adjust the opacity and blend mode, then download. The Overlay blend mode works great for subtle color grading, while Multiply creates darker, moodier effects.
Which blend mode should I use?
Overlay adds contrast and vibrancy — ideal for most photo enhancements. Multiply darkens images for dramatic shadows. Screen brightens for airy, ethereal looks. Soft Light gives a gentle, natural tint. Experiment to find your perfect style!
Can I use this tool for free?
Yes! This gradient overlay tool is completely free to use with no registration, no watermarks, and no usage limits. Process as many images as you need directly in your browser — your files are never uploaded to any server.
What image formats are supported?
You can upload JPG, PNG, WebP, GIF (static), and BMP images. Downloads are saved as high-quality PNG files to preserve transparency and color accuracy. Maximum recommended resolution is 6000×4000 pixels for smooth performance.
How is this different from Instagram filters?
Unlike pre-made filters, this tool gives you full control over every aspect: exact colors, gradient angle, opacity strength, and blend mode. You can create custom color grades that match your brand or aesthetic perfectly, then copy the CSS code for web use.
Can I use the CSS code on my website?
Absolutely! Click "Copy CSS" to get the exact gradient and blend mode code for your website. This is perfect for adding matching gradient overlays to hero images, banners, or background sections using pure CSS.
Is my image uploaded to a server?
No. All image processing happens locally in your browser using the HTML5 Canvas API. Your images never leave your device, ensuring complete privacy and security. This also means the tool works offline once loaded.
Screenshot Color Picker - Online Upload & Pick Hex
Upload a screenshot or image and use the magnifying glass to pick exact colors. Get hex, RGB, and HSL. Simple.
WebGPU Shader Playground - Online WGSL Editor
Write a compute shader in WGSL and run it in the browser. See the output on a canvas. Learn WebGPU. Real‑time compilation.
Color to Tailwind Class Converter - Online Map Hex to closest
Enter any hex color and find the nearest Tailwind CSS color class. Also shows the Tailwind palette shade.
HEX to HSL Converter - Online Color Code to Hue Saturation Lightness
Translate HEX colors to HSL values and adjust lightness and saturation visually. Great for creating color variations in CSS design systems.
Online Alarm Clock - Set & Wake with Sound
Set an alarm that rings at a specific time even if the tab is in background. Multiple alarm tones. Works offline.
Countdown Timer with Laps - Online Workout & Study
Run a countdown timer that automatically repeats for a set number of laps. Great for HIIT, study sprints, or any interval work.
Memory Sequence Game - Online Watch & Repeat Colors
Watch a color sequence and click the same pattern. Gets longer each round. Test and improve your working memory. All local.
Scan Barcode from Camera - Online Live UPC/EAN Reader
Point your camera at a barcode and decode it live. Works with multiple formats. Pure JavaScript barcode detection.
Online Audio Reverb Tool - Add Room Ambience
Add artificial reverb to an audio recording. Choose from small room to large hall. Wet/dry mix. Convolution‑based.
Binary Clock - Online Real‑Time Time in BCD
View the current time in binary (BCD) format. A stylish geek clock with dot columns. Toggle between binary and decimal labels.
Retro Clock Widget - Online Fullscreen Nixie or Flip Clock
Display a stylish retro flip clock or Nixie tube clock in full screen. Perfect for desk presentation or decoration. Pure CSS and JS.
Live Binary Clock - Online Hex & Decimal Time
See the current time displayed in binary and hexadecimal. Dark theme, full‑screen mode. A geeky desk decoration.
Online Hash Generator - MD5 SHA1 SHA256 CRC32 Checksum
Generate cryptographic and checksum hashes for any text string. Supports MD5, SHA-1, SHA-256, and CRC32. All hashing runs locally for maximum privacy.
Roman Numeral Arithmetic - Online Add & Subtract
Enter two Roman numerals and add or subtract them. See the result in Roman and Arabic. A fun mental workout.
Image FFT Visualizer - Online See Frequency Domain
Upload an image and see its 2D FFT magnitude and phase. Learn how image filtering works. Educatinal tool. Canvas.
Advanced CSS Gradient Builder - Online Multi‑Stop & Angle
Create complex linear gradients with any number of color stops, exact angles, and length units. Live preview and CSS code.
Image Palette Extractor (Paste) - Online Clipboard Image
Paste an image from your clipboard directly into the page (Ctrl+V) and extract its color palette. No file dialog needed.
Image Color Blindness Simulator - Upload & See
Upload any image and view it as a person with deuteranopia, protanopia, or tritanopia would. Promote inclusive design.
Live Color Mix Blender - Online Mix Two Colors Visually
Pick any two colors and blend them proportionally with a slider. Get the resulting hex, RGB, and HSL. Pure client‑side.
Image Round Corners - Online Add Border Radius Smoothly
Apply a precise rounded corner effect to an image by cropping with a mask. Download as transparent PNG. All local.
Image Format MIME Checker - Online Identify True Type
Drop an image that might have wrong extension and see its real format (JPEG, PNG, WebP) based on header bytes.
Image to CSS Grid Layout - Online Pixel‑Based Generator
Upload a small pixel art image and get a CSS grid layout that recreates it using divs. Novelty developer tool.
Image Aspect Ratio Fitter - Online Resize to Exact Fit
Resize and crop an image to a specific aspect ratio (1:1, 16:9…) with automatic fit/cover. Download the perfect image.
Batch Image to Base64 Encoder - Online Multiple Files
Convert multiple images to Base64 data URIs at once. Copy individually or as a JSON array. Great for inline assets. Local.
Text Diff to Image - Online Compare & Export as PNG
Paste two texts, compute the diff, and render the result as a highlighted image. Easier to share changes visually.
Rain Overlay Effect - Online Add Rain to Photo
Add a realistic animated rain or static rain overlay to your image. Adjust opacity and droplet size. Download final.
Random CSS Gradient Background - Online Inspiration Generator
One click random beautiful gradient backgrounds with copy‑ready CSS. See full‑screen preview. Never run out of background ideas.
Image Border Frame Generator - Online Photo Frame Overlay
Add a decorative rectangular border/frame to your image. Adjust width, color, and shadow. Download the framed photo.
Gradient Match Game - Online Drag & Match Linear CSS
Recreate the target CSS linear gradient by adjusting stops and colors. A unique game for front‑end developers to master gradients.