All 111 Free Online Tools
Organized by Category and Searchable

Stamp page numbers anywhere on every page. Pick from 9 positions, choose text format, font, size, colour, and margin. Live preview updates instantly - runs entirely in your browser.

Stamp a text or image watermark on every page of your PDF. Control opacity, position, and size. Runs entirely in your browser - no uploads.

Make any photo bigger and sharper in seconds. Upload your image, pick 2x, 3x, or 4x, and get a crisp high-resolution version instantly. Free, no signup, and your photo never leaves your device.

AI segmentation model detects your subject automatically - portraits, products, animals, objects - and removes the background in seconds. Output is a transparent PNG with sub-pixel edge accuracy. AI runs locally via WebAssembly. No image is ever uploaded to any server.

Encode text, files, and images to Base64 or decode Base64 strings back to files. Generate data URIs for HTML and CSS embedding. Free Base64 encoder and decoder, 100% private.

Create CSS border-radius visually. Standard corners or fancy 8-point elliptical shapes, drag handles on the preview, 15+ shape presets, and instant CSS output - no coding needed.

Design CSS box shadows visually. Stack unlimited layers, toggle visibility, duplicate layers, apply 8 presets, resize the preview box, and copy production-ready CSS in one click.

Paste any URL to instantly scan every link on that page for broken links, 404 errors, and dead pages. Results appear live as each link is checked. Filter, sort, and export with one click. Free, no sign-up.

Convert text between 16 case formats instantly. Click any pill - UPPER CASE, camelCase, snake_case, COBOL-CASE, Train-Case, path/case and more. Auto-converts as you type.

Beautify and format code for multiple languages. Transform minified or messy code into clean, readable format instantly.

Compare code changes side by side with syntax highlighting. Instantly see additions, deletions, and modifications between two code versions.

Replace any color in your image online free - no Photoshop, no upload. Click to pick a color, adjust tolerance for similar shades, and swap it instantly. Free online color replacer for product variants, background swaps, logo recoloring, and creative edits.

Convert between HEX, RGB, HSL, HSV, and CMYK color formats instantly. Perfect for designers and developers working with colors.

Generate complementary, triadic, analogous, and split-complementary color harmonies. Based on color theory for perfect color relationships.

Generate beautiful color palettes instantly. Complementary, analogous, triadic, and monochromatic schemes. Export as CSS, Sass, or design files.

Upload two versions of any PDF and instantly see every addition, deletion, and modification highlighted side by side. Works entirely in your browser. No upload, no account.

Shrink large PDFs for email, storage, or sharing. Choose compression level (Moderate / High / Maximum), enable Grayscale for extra reduction, strip metadata, and get an instant before/after size comparison - all in your browser, nothing uploaded.

Drag 8 resize handles on a live page preview to define your crop area. Apply to a single page or all pages at once. No uploads - runs entirely in your browser.

Generate CSS keyframe animations from 50 presets - fade, slide, bounce, spin and more. Customize timing, duration, and easing. Live preview and download .css file free.

Design stunning CSS buttons visually. Choose from 10 style presets including Glass, Neon, and Neumorphic. Add Phosphor icons, text shadows, focus rings, and copy production-ready HTML, CSS, or Tailwind code instantly.

Generate CSS linear and radial gradients visually. Add unlimited color stops, adjust angle, choose from presets, and copy clean CSS code instantly. Free CSS gradient generator.

Build CSS Grid layouts without memorizing property names. Visual controls for every grid property - columns, rows, gaps, named areas, alignment, auto-flow - with live preview and copy-ready CSS + Tailwind output.

Minify CSS files to reduce size by up to 70%. Improve page load speed and website performance. Fast, secure, and completely free.

Generate CSS 2D and 3D transforms visually. Scale, rotate, skew, and translate with live preview. Perspective control, flip presets, and vendor prefix toggle. Free CSS transform generator.

Convert px, rem, em, pt, pc, in, cm, mm, vw, vh, vmin, vmax, ch, ex - all results in one click. Custom base font, viewport dimensions, formula hints, and instant copy.

Convert CSV spreadsheets to JSON format instantly. Perfect for API integration, data processing, and web development.

Select and remove unwanted pages from any PDF file in seconds. No uploads, no software - runs entirely in your browser using pdf-lib.

Find duplicate photos and similar images online free - no upload needed. Perceptual hash detects exact duplicates and near-duplicates, even edited versions. Free duplicate photo finder for cleaning photo libraries and freeing storage space.

Write on any PDF, draw shapes, add images, highlight text, and erase mistakes. Then save and download your edited PDF. Free, private, nothing to install.

View image EXIF data, camera settings, GPS location, timestamps. Remove metadata for privacy. Analyze photo technical details.

Pick exactly the pages you need from any PDF. Click thumbnails, type ranges, use odd/even shortcuts, rotate pages, and preview at full resolution - then download as a single PDF or separate files. 100% browser-based, no uploads.

Draw over any part of your photo to blur it. Hide faces, license plates, addresses, or anything private. No account needed and nothing leaves your browser.

Convert PDF form fields, annotations, and hyperlinks into permanent static content. Batch process multiple files, choose Standard or full-page Image mode with custom DPI. Free, private & 100% browser-based - nothing uploaded.

Build CSS flexbox layouts without memorizing property values. Visual controls for every flex property - direction, wrapping, alignment, gap, grow/shrink - with live preview and copy-ready CSS + Tailwind output.

Convert images to grayscale, black and white, or monochrome. Adjustable conversion method: luminosity, average, desaturation. Contrast and brightness control for perfect B&W results. Perfect for artistic photos, professional portraits, vintage aesthetic, and print-ready images.

Add a customizable grid overlay to any photo. Rule of thirds, golden ratio, or custom grid sizes. Adjust color, opacity, and line thickness. Free, no upload needed.

Generate and verify cryptographic hashes for text and files. Supports MD5, SHA-1, SHA-256, SHA-384, SHA-512 with HMAC signing, Base64 output, and one-click hash verification - all 100% private, in your browser.

Encode and decode HTML entities instantly. Convert special characters for safe HTML display and prevent XSS attacks.

Write or paste any HTML and CSS, set the canvas size, and export a crisp image in seconds. Works entirely in your browser. No uploads, no account, no limits.

Paste HTML or fetch any live URL - get a pixel-accurate PDF rendered at full desktop width. Runs entirely in your browser, nothing uploaded.

Minify or beautify HTML, CSS, and JavaScript code. Reduce file size by up to 80% or format code for better readability.

Complete HTTP status codes reference with cause and fix steps. Search 200, 301, 404, 500, 502, 503 and every 1xx-5xx code. Includes Nginx codes and deprecated tags.

Blur images online with adjustable intensity. Apply selective area blur to hide faces, license plates, text, or personal information. Full image blur or precise area selection. Perfect for privacy protection and censoring sensitive content before sharing photos publicly.

Add customizable borders and frames to images. Solid colors, gradients, patterns, rounded corners, shadows. Adjustable width, padding, border radius. Perfect for social media posts, photo printing, certificates, framing artwork, and creating professional polaroid-style photos.

Extract colors from images. Get HEX, RGB, HSL codes. Generate color palettes, find dominant colors, perfect for design and branding.

Upload JPG, PNG, WebP, or GIF images and reduce file sizes by up to 80%. Drag the quality slider, see before/after file sizes instantly, batch-compress multiple images, and download as a ZIP. Everything runs in your browser - files never uploaded.

Drag 8 resize handles on a live preview to define the exact crop area. Lock a preset aspect ratio (1:1, 4:3, 16:9, 9:16), enable rule-of-thirds overlay, or enter exact pixel coordinates. Your files never leave your browser.

Edit photos with 13 professional filter presets - Vintage, B&W, Lomo, Chrome, Fade, Dramatic and more. Fine-tune brightness, contrast, saturation, hue, blur, sepia, invert and opacity with live preview. Flip horizontally or vertically, rotate 90°, and export as PNG or JPG - all free, all in your browser.

Upload JPG, PNG, WebP, or GIF files and choose a target format. Quality slider controls size vs. clarity. Batch convert multiple images and download individually or as a ZIP. All conversion runs in your browser - files never uploaded.

Merge 2 or more images into a single file - horizontally (side by side) or vertically (stacked). Control the gap between images, gap fill color, and alignment (start, center, or end). Live preview updates instantly as you adjust settings. Download as PNG or JPG.

Enter exact pixel dimensions, lock the aspect ratio, or pick from 15+ social media presets for Instagram, YouTube, Facebook, and more. Batch resize multiple images at once. Your files never leave your browser.

Rotate images to any angle or flip horizontally/vertically. Fix orientation, create mirror effects, adjust composition.

Sharpen images with professional unsharp mask algorithm. Enhance fine details, edges, and textures in blurry or soft photos. Adjustable sharpening amount, radius, and threshold for precise control. Perfect for fixing slightly out-of-focus images and restoring clarity after resizing.

Split images into perfectly sized grid tiles for Instagram, printing, or any use case. Pick a quick preset (2×2, 3×3, 4×4, Instagram 1×3) or enter custom rows and columns up to 30×30. A live preview with dashed split lines shows exactly how your image will be divided - download individual tiles or all at once as a ZIP.

Convert up to 10 images at once to Data URI, HTML img, CSS bg, Favicon, JSON, Markdown, or plain Base64. Fetch remote images by URL. Decode any Base64 or Data URI back to an image.

Look up any IPv4, IPv6, or domain to get city, country, ISP, ASN, reverse DNS hostname, and timezone. Free instant IP geolocation and IP address lookup tool.

Convert JPG, PNG, WebP, GIF, or BMP images to a professional PDF. Choose page size, orientation, and fit mode. Drag to reorder, then download - all in your browser.

Format, validate, and beautify JSON data instantly. Perfect for developers working with APIs and data structures. Fast, secure, and free.

Convert JSON to CSV online - handles nested objects and auto-detects columns. Bidirectional: convert CSV back to JSON too. Free, instant download, no sign-up.

Convert JSON to clean, readable YAML instantly. Perfect for Kubernetes configs, Docker Compose files, and CI/CD pipelines.

Decode JWT headers and payloads instantly, then verify signatures using HMAC (HS256/384/512), RSA (RS256/384/512), or ECDSA (ES256/384/512). All processing is 100% client-side.

Check keyword frequency and density in your content. Optimize for SEO without keyword stuffing. Analyze word frequency and density percentages.

Generate Lorem Ipsum placeholder text in paragraphs, sentences, words, or HTML lists. Control sentence count, download as .txt or .html - all free, no signup.

Convert Markdown to clean HTML instantly. Perfect for documentation, blogs, README files, and content creation with live preview.

Choose from 17 classic meme templates or upload any image. Add unlimited text layers, drag them freely anywhere on the canvas, and download as PNG, JPG, or WebP - no watermark, no signup required.

Upload PDFs, see page-count previews, drag to reorder, sort alphabetically, name your output file, and merge - all in your browser. Zero uploads, zero limits, zero cost.

Generate perfect meta tags for SEO and social media. Preview how your pages appear in search results, Facebook, Twitter, and LinkedIn.

Remove noise and grain from photos. Fix grainy images from high ISO, low light, or night photography. Noise reduction algorithms preserve details while smoothing grain. Adjustable strength for subtle or aggressive denoising. Perfect for cleaning up smartphone photos and dark scene images.

Turn scanned or image-based PDFs into readable, searchable text in seconds. Pick your language, choose plain text or searchable PDF output, and run it all inside your browser.

Preview how your pages appear when shared on Facebook, Twitter, LinkedIn. Test Open Graph and Twitter Card meta tags before publishing.

Create og:title, og:description, og:image and Twitter Card meta tags with live preview across 6 platforms. Generate copy-ready HTML instantly.

Drag and drop pages into any order. Rotate sideways pages. Delete what you don't need. See live thumbnails of every page - all 100% in your browser.

Analyze any website with real Core Web Vitals (LCP, FCP, CLS, TTFB, and TBT) measured live in your browser. The best free GTmetrix alternative to check your site speed, benchmark page performance, and audit render-blocking resources.

Check color contrast for every combination in your palette at once. Generate a full WCAG contrast matrix - both AA and AAA results side by side. No dropdowns, no switching.

Generate cryptographically secure random passwords instantly. Customize length, characters, and strength. Protect your accounts with unbreakable passwords.

Check password strength instantly. See crack times across 4 attack scenarios, detect weak patterns, and verify if your password appeared in a real data breach - all 100% private in your browser.

Fill text fields, checkboxes, radio buttons, dropdowns, and signature fields in interactive PDFs - right in your browser. Supports password-protected files. No upload, no account.

Upload a PDF, pick which pages to convert, choose your resolution (72-300 DPI) and quality, then download JPG images individually or as a single ZIP. 100% in your browser - nothing is uploaded.

Convert PDF pages to lossless PNG images with transparent background support. Perfect for extracting diagrams and graphics. All in your browser.

Open a PDF and get all its text in seconds. Read page by page, search for any word, keep the original layout, copy what you need, or save it as a text file - no account, no upload, nothing to install.

Pixelate images with adjustable block size. Apply selective area pixelation to censor faces, text, or sensitive info. Full image or brush-on regional pixelation. Create 8-bit pixel art aesthetic. Perfect for privacy protection, retro gaming look, and artistic mosaic effects.

Add a password to any PDF so only the right people can open it. Control who can print, copy, or edit the file. Runs in your browser. Your file never leaves your device.

Generate QR codes for URLs, text, contact info, WiFi, and more. Customize colors, add logos, and download in high resolution. 100% free, no signup required.

Build URL query strings visually. Add parameters, toggle rows, choose %20 or + encoding, add #fragments, and copy the full URL instantly. Free URL builder tool.

Generate cryptographically secure random strings, passphrases, and ready-made format presets - UUID v4, API keys, JWT secrets, hex tokens - with live entropy display.

Paste any text or enter a URL and instantly see a plain-English verdict: who can read it, what grade level it targets, and exactly how to make it clearer.

Draw custom redaction boxes over sensitive text, names, ID numbers, or images in any PDF. Set custom color, opacity, and label text. Strip metadata on save. 100% browser-based - your file never leaves your device.

Test and debug regular expressions with live matching, syntax highlighting, and detailed explanations. Perfect for developers learning regex.

Upload a broken PDF and get a clean, readable file back in seconds. Rebuilds document structure, strips harmful JavaScript, shows a recovery report with page thumbnails. 100% in your browser.

Create robots.txt files to control how search engines crawl your website. Block private pages, set crawl delays, and reference sitemaps.

See every page as a thumbnail. Select any combination of pages, rotate left, right, or flip 180°. Preview the result instantly and save - all in your browser, nothing uploaded.

Turn your device camera into a document scanner. Capture pages, apply readability filters, rotate and review, then download a clean multi-page PDF - all in your browser.

Generate valid schema.org structured data for Articles, Products, Events, Recipes, Job Postings, Courses, Books, Movies, NewsArticles, and 10 more types. Includes Google SERP-style rich snippet preview and inline validation.

Enter any URL for a complete on-page SEO audit in seconds. Check title tags, meta descriptions, H1-H3 headings, image alt text, Open Graph tags, canonical URL, and 10 more checks. Score out of 100 - free, no sign-up.

Add realistic drop shadows and depth effects to images. Adjustable shadow blur, distance, angle, opacity, and color. Soft shadows, hard shadows, perspective shadows. Perfect for product photography, logo design, cutout images, and creating 3D floating effects.

Draw, type, or upload your signature and place it on any PDF page. Your signed PDF downloads instantly. 100% browser-based - no uploads, no accounts.

Three powerful split modes in one tool. Enter custom page ranges like 1-3, 5, 7-10 - or split every N pages - or extract every page individually. Runs 100% in your browser, nothing uploaded.

Add custom text to images with professional styling. Choose fonts, colors, sizes, bold, italic, underline. Apply shadows, outlines, backgrounds for readable text on any photo. Perfect for memes, quotes, watermarks, social media graphics, and marketing materials.

Generate perfect thumbnails from images. Multiple sizes, auto-crop smart cropping, batch process hundreds of images for websites and galleries.

Convert Unix timestamps to human-readable dates, dates back to timestamps, and break down any duration - with timezone support, auto-unit detection, and 8 output formats.

Type or paste text, upload a .txt / .md / .csv file, pick your font, alignment, color, page size, and orientation - add page numbers, watermark, password, and more. 100% browser-based, nothing uploaded.

Remove the password from a PDF you own or lift print, copy, and edit restrictions in one click. Runs entirely in your browser - your file is never uploaded.

Encode or decode URLs instantly. Full-component mode, recursive decode, each-line batch, uppercase hex, smart paste, and a live URL breakdown panel with editable query params.

Convert titles and headings to SEO-friendly URL slugs instantly. Remove spaces, special characters, and optimize for search engines.

Parse any user agent string to detect browser name, OS, device type, and 30+ bots. Your current UA is auto-loaded. Free user agent parser, 100% private.

Build UTM-tagged URLs to track marketing campaigns in Google Analytics. Monitor traffic sources, campaigns, and conversions accurately.

Generate UUID v1, v4, and v5 instantly for database records, API keys, and unique identifiers. Fast, standards-compliant, and completely free.

Add vignette effects to images with adjustable darkness, size, feathering, and shape. Dark or bright vignettes. Draws attention to center subject by darkening or fading edges. Perfect for portraits, wedding photos, dramatic photography, and vintage film aesthetic.

Add text or image/logo watermarks to protect your photos. Customize font, bold/italic style, size, color, opacity and rotation. Choose from 9 positions or tile across the full image. Live preview updates as you type - export as PNG or JPG, fully private in your browser.

Check color contrast ratios for accessibility compliance. Ensure WCAG AA and AAA standards. Make designs readable for everyone.

Check if a website is down for everyone or just you. Get HTTP status code, response time, redirect chain, and a free 4-ping latency test - no sign-up needed.

Instantly count words, characters, sentences, paragraphs, and estimate reading time. Perfect for writers, students, and SEO.

Generate XML sitemaps to help search engines discover and index your pages. Add URLs with priorities, change frequencies, and last modified dates.

Convert XML data to JSON format instantly. Perfect for API integration, data transformation, and modern web development.

Convert YAML to JSON instantly. Perfect for configuration files, CI/CD pipelines, and API development.