Tool StudioExplore 81 free tools to simplify your workflow
81
Total Tools
14
Categories
A beautiful markdown viewer with live preview and syntax highlighting. Perfect for viewing and editing README files with real-time rendering.
Format, validate, and beautify JSON data instantly. Minify JSON, fix formatting errors, and validate JSON syntax online. Perfect for developers working with APIs and configuration files.
Compare two texts side-by-side with color-coded highlighting for additions, deletions, and modifications. Supports line-by-line, word-level, and character-level comparison modes. Perfect for code review, document comparison, and tracking changes.
Test your internet connection speed instantly — ping, download, and upload, all measured live in your browser. No app install, no sign-up. Free, unlimited use.
Convert images to Base64 encoded strings instantly for easy embedding in HTML, CSS, JSON, or any text-based format. Supports all common image formats including PNG, JPG, GIF, WebP, and SVG. Features multiple output formats (Data URI, Plain Base64, HTML img tag, CSS background-image, JSON), drag-and-drop upload, real-time preview with file information, one-click copy to clipboard, and download as text file. Perfect for web developers embedding images inline, API responses with image data, email templates, offline web apps, and reducing HTTP requests. Shows original and Base64 file sizes with increase percentage. 100% client-side processing ensures complete privacy - images never leave your device.
Decode Base64 encoded strings back to image files instantly. Perfect for developers working with Base64 image data in web applications, APIs, or databases. Supports all common image formats including PNG, JPG, GIF, WebP, and BMP. Features include pasting Base64 strings (with or without data URI prefix), automatic format detection, live image preview with dimensions and file size, one-click download of decoded images, and format information display. Handles both raw Base64 strings and complete data URI format (data:image/png;base64,...). Useful for debugging API responses with Base64 images, converting database-stored Base64 images, testing Base64 image data, extracting images from JSON/API responses, and validating Base64 encoded images. 100% client-side processing ensures complete privacy - all decoding happens in your browser, data never leaves your device. No file size limits.
Generate professional QR codes with smart auto-detection and formatting. Automatically recognizes content type (URL, phone, email, WhatsApp, SMS, WiFi) and formats it optimally for maximum scanning compatibility. Features intelligent type detection, customizable sizes (128px to 1024px), real-time preview, format toggle, and high-quality PNG download. Perfect for business cards, marketing materials, contact sharing, WiFi access, event tickets, and digital payments. 100% client-side processing ensures complete privacy.
Convert Unix epoch timestamps to human-readable dates and back. Live current-timestamp ticker, auto-detects seconds vs milliseconds, outputs ISO 8601, UTC, local time, and relative ("2 hours ago") formats. Perfect for debugging logs, APIs, and databases.
Combine multiple PDF files into a single document. Upload PDFs, drag them into order (or use the up/down buttons), and merge them instantly. No sign-up, no watermark, no daily limit, and no premium tier to hit a wall against — everything on this site is free. Perfect for organizing reports, contracts, invoices, and documents into one file.
Visually drag and drop to reorder the pages of a PDF. See a thumbnail of every page before you rearrange them. Files are processed securely and deleted automatically after conversion.
Test if every key on your keyboard works. Press any key and watch it light up on the on-screen layout — spot stuck, dead, or unresponsive keys instantly. Free, works entirely in your browser.
Pick any color from your screen, an uploaded image, or a swatch, and get instant HEX, RGB, and HSL values. Uses the browser's native EyeDropper API where available. All processing happens in your browser.
Instantly see your public IP address. Detects IPv4 or IPv6, one-click copy. Free, no sign-up, no tracking beyond what your connection already reveals.
Convert colors between HEX, RGB, and HSL instantly, and generate shade, complementary, analogous, and triadic palettes from any base color. All processing happens in your browser.
Compress PNG, JPEG, and WebP images to reduce file size while maintaining quality. Features adjustable quality control, batch processing, before/after preview, size comparison, and instant download. Perfect for optimizing images for web, email, or storage. All compression happens in your browser for complete privacy.
Reduce PDF file size online with our powerful compression tool. Compress large PDF documents while maintaining optimal quality with customizable compression levels. Features three quality modes — Low (smallest file size), Medium (balanced, good size-to-quality ratio), and High (best quality, minimal size reduction) — plus an exact target-KB size if you need one. Perfect for reducing file sizes before email attachments, uploading to websites with size limits, saving storage space, optimizing PDFs for web delivery, and preparing documents for faster sharing. Uses advanced compression algorithms to optimize content streams and reduce redundant data. All processing is secure with automatic file cleanup after compression. Upload files up to 50MB for instant compression and download. Ideal for business documents, presentations, reports, scanned documents, and image-heavy PDFs. No registration required, completely free to use with unlimited compressions.
Scan and decode QR codes from images or camera instantly. Extract URLs, text, contact info, WiFi credentials, and more from any image containing a QR code or barcode. Fast, secure, and supports multiple formats.
Split PDF files into multiple documents by custom page ranges. Create named splits, validate page ranges, and automatically handle leftover pages. Perfect for extracting chapters or sections from large PDFs.
Generate strong, random passwords instantly. Adjustable length and character sets (uppercase, lowercase, numbers, symbols), live strength indicator, one-click copy. All generation happens in your browser using the Web Crypto API — passwords are never sent anywhere.
Encode or decode URLs and URL components instantly. Supports both component encoding (encodeURIComponent, for query params) and full-URL encoding (encodeURI, preserves URL structure). Perfect for debugging query strings, API requests, and web forms.
Comprehensive text processing tool: count characters, words, lines, sentences, and paragraphs; convert case across 7 styles (UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case); find & replace with case-sensitive and whole-word matching plus a live match counter; and remove extra spaces. Copy or download the result. All processing done locally in your browser — nothing is uploaded.
Generate random UUID v4 identifiers instantly, one or in bulk (up to 100 at once). Copy individually or all at once. Perfect for database keys, API testing, and unique identifiers in code. 100% client-side using crypto.randomUUID().
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files instantly. Perfect for verifying file integrity, checksums, and debugging. All hashing happens in your browser using the Web Crypto API — nothing is uploaded.
Resize images to exact pixel dimensions or by percentage, with an aspect-ratio lock. Convert to PNG or JPEG. Preview before/after size and dimensions. All processing happens in your browser — images never leave your device.
Convert images between PNG, JPEG, WebP, and AVIF instantly. Also accepts GIF and BMP as source images. Preview before/after file size. All conversion happens in your browser — images never leave your device.
Test your device camera, capture photos with live preview, and download images instantly. Perfect for testing camera functionality.
Complete audio testing tool - test your microphone with live waveform visualization and test left/right speakers by recording and playing back audio through specific channels.
Remove specific pages from a PDF visually — see every page as a thumbnail, click to mark the ones you want gone, and download the result instantly. No sign-up, no watermarks, and no daily limit — everything on this site is free, with no premium tier to hit a wall against.
Remove password protection from PDF files quickly and securely. Upload encrypted PDFs, enter the password, and download the unlocked version without any restrictions. All files are processed securely and deleted immediately after.
Add password protection to a PDF, restrict what can be done with it, or both. Upload any PDF, set an open password and/or tick a checkbox to restrict printing, copying, and editing, then download the result. Perfect for securing sensitive documents, contracts, and confidential files.
Search up to 5 words or phrases simultaneously with color-coded highlighting, occurrence counters, and easy navigation — no browser extension to install. Warns you if two search boxes have the same term, and when two terms' matches overlap, the earlier one wins so highlighting never looks broken. Perfect for analyzing documents, finding patterns in large texts, and reviewing content with multiple search terms at once.
Crop and resize images to specific aspect ratios with an interactive drag-and-drop crop box. Choose from preset ratios like 16:9, 4:3, 1:1, or create custom ratios. Perfect for social media posts, profile pictures, banners, and any content requiring specific dimensions. All processing happens in your browser.
Extract audio and music from any video - MP4, MOV, MKV, WebM, AVI - and save it as MP3, WAV, AAC, OGG or FLAC. Free, done in your browser.
Comprehensive token tool to decode, verify, and generate JWT (JSON Web Tokens) and PASETO (Platform-Agnostic SEcurity TOkens) instantly. View header, payload, and signature sections with syntax-highlighted JSON. Generate new tokens with custom payloads. Perfect for developers debugging authentication tokens, API tokens, and bearer tokens. Features instant real-time decoding as you type, support for both JWT and PASETO token formats, token generation with custom algorithms (HS256, HS384, HS512), three-part visualization showing header/version, payload, and signature/footer separately, color-coded JSON syntax highlighting for easy reading, one-click copy to clipboard for each section, and complete client-side processing for maximum security. All token processing happens entirely in your browser - tokens are never transmitted to any server, ensuring complete privacy and security. Supports all standard JWT formats and PASETO v2/v4. Ideal for debugging authentication flows, inspecting API tokens, generating test tokens, understanding token structure, validating token claims, and learning about modern authentication. No installation or registration required.
Generate every standard favicon size from one image — 16×16 up to 512×512, plus Apple touch icon and Android/PWA sizes — along with a ready-to-use web manifest. All processing happens in your browser.
Rotate PDF pages with real visual page thumbnails — click any single page to rotate just that one 90° at a time, or use "Rotate all" to apply one angle to the whole document in one click. Mixed-orientation documents (some pages scanned sideways, others not) are handled directly, no need to split the file first. Files are processed securely and deleted automatically after conversion.
Convert Microsoft Office documents to PDF format instantly. Supports Word documents (DOC, DOCX), PowerPoint presentations (PPT, PPTX), Excel spreadsheets (XLS, XLSX), and OpenDocument formats (ODT, ODS, ODP) from LibreOffice/OpenOffice. Features fast server-side conversion using LibreOffice, preserves original formatting and layout, and drag-and-drop file upload with instant download of the converted PDF. Perfect for creating universal document formats, archiving documents, sharing presentations, converting spreadsheets for printing, and ensuring document compatibility across platforms. All conversions are processed securely on our server with automatic file cleanup after conversion.
Convert every page of a PDF into a JPG or PNG image. Choose standard, high, or maximum quality, download all pages as a single zip. Files are processed securely and deleted automatically after conversion.
Upload multiple images, arrange them in any order with intuitive drag-and-drop (built to work on touch devices too, not just mouse), and convert to a single PDF document. Perfect for creating photo albums, organizing scanned documents, compiling receipts, or preparing presentations. Features unlimited image uploads (no count cap, unlike some well-known converters that cap free users at 20 images), drag-and-drop reordering, live preview with position numbers, support for JPG, PNG, GIF, WebP, and BMP formats, quality preservation in PDF output, individual image deletion, instant PDF generation and download, and automatic cleanup for privacy. Each image becomes a full page in your PDF with maintained aspect ratio. Ideal for creating photo albums from vacation pictures, organizing receipts and invoices, compiling scanned documents, preparing visual presentations, creating image-based reports, and archiving photos in PDF format. Upload images up to 20MB each, with fast server-side processing and automatic file deletion after conversion.
Convert iPhone HEIC/HEIF photos to standard JPEG. Most browsers and apps can't open HEIC directly — this converts it to a universally compatible JPEG. Files are processed securely and deleted automatically after conversion.
Test regular expressions against sample text with live match highlighting, capture groups, and flag support (g/i/m/s). All processing happens in your browser.
Convert YAML to JSON or JSON to YAML instantly, in either direction, with clear parse-error messages. All conversion happens in your browser.
Convert between length, weight, temperature, speed, and scientific units instantly — from millimeters to light-years, and moles to atoms. Free, works entirely in your browser.
Interactive sorting algorithm visualizer to watch and learn how different sorting algorithms work in real-time. Visualize Bubble Sort, Selection Sort, Insertion Sort, Merge Sort, Quick Sort, and Heap Sort with step-by-step animations. Perfect for computer science students, developers preparing for interviews, and anyone learning data structures and algorithms. Features 6 different sorting algorithms with live visualizations, adjustable speed control from very slow to very fast, variable array size from 10 to 150 elements, real-time statistics showing comparisons and swaps, color-coded visualization with different colors for comparing (yellow), swapping (red), pivot (orange), and sorted (green) elements, live timer tracking execution time, responsive design that works on desktop, tablet, and mobile, dark and light theme support, and educational complexity information for each algorithm showing best, average, worst, and space complexity. Watch every comparison and swap as it happens with smooth animations. Generate new random arrays instantly. Stop and restart sorting at any time. Learn algorithm efficiency by comparing different sorting methods on the same data. Understand time complexity differences between O(n²) and O(n log n) algorithms visually. See how divide-and-conquer algorithms like Merge Sort and Quick Sort partition and solve sub-problems. Observe the heap building process in Heap Sort. All processing happens entirely in your browser with no data sent to servers. Perfect for visual learners, interview preparation, classroom teaching, algorithm comparison, and self-paced education.
Crop a photo to exact passport/visa photo dimensions for India, USA, UK, Schengen, Canada, China, and Australia. Interactive drag-and-drop crop box, precise pixel output at 300 DPI print quality. All processing happens in your browser.
Look up A, AAAA, CNAME, MX, TXT, NS, CAA, SOA, SRV, and PTR DNS records for any domain — or run a reverse DNS lookup by entering an IP address instead. Queries a public DNS-over-HTTPS resolver directly from your browser — no data is sent to our servers.
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Type in any field and the others update live. Uses arbitrary-precision math, so very large numbers stay accurate. All processing happens in your browser.
Test if your mouse buttons, scroll wheel, and double-click all work correctly. Press left, middle, or right click and watch it register, and measure your double-click speed. Free, works entirely in your browser.
Calculate the exact number of days, weeks, months, and years between two dates, with an optional business-days-only count. All calculation happens in your browser.
Cut a video down to just the part you need. Pick a start and end point and download the trimmed clip. Files are processed securely and deleted automatically after conversion.
Combine multiple videos into one, even if they have different resolutions. Upload videos, reorder them, and download a single merged file. Files are processed securely and deleted automatically after conversion.
Reduce video file size with adjustable quality levels. Perfect for email attachments or upload limits. Files are processed securely and deleted automatically after conversion.
Generate placeholder Lorem Ipsum text by paragraphs, sentences, or words. Copy or download instantly. All generation happens in your browser.
See your screen resolution, browser viewport size, device pixel ratio, and estimated DPI, live. Free, works entirely in your browser.
Convert a video clip into an animated GIF. Choose the frame rate, width, and section of the video to convert. Files are processed securely and deleted automatically after conversion.
See your browser name and version, rendering engine, operating system, and full user-agent string, along with language, viewport, and cookie settings. Free, works entirely in your browser.
Measure your browser's live frames-per-second and get an estimate of your monitor's refresh rate. Free, works entirely in your browser.
Convert SVG markup or files to PNG images at any scale, from 1x up to 8x for crisp high-resolution output. All rendering happens in your browser using canvas — nothing is uploaded.
Cut and trim audio, MP3 and songs online - keep the part you want or cut a part out of the middle. Make a ringtone for iPhone or Android. Free, 100% in your browser.
Repeat a video so it plays several times, or until it reaches the length you want. Copied without losing quality. Free, 100% in your browser.
Split a video into parts by length, number of parts, size or the times you choose. The parts are copied without losing quality. Free, 100% in your browser.
See what your video reveals - location, device, date - and remove it in seconds. The picture and sound are copied exactly as they are. Free, 100% in your browser.
Remove the sound from a video and keep the picture exactly as it is. Mute MP4, MOV, MKV, WebM, AVI and WMV files in seconds. Free, 100% in your browser.
Speed up or slow down songs, music and audio from 0.25x to 4x, with or without changing the pitch. Free, 100% in your browser.
Make MP3s, songs and audio files louder or quieter, or even out their loudness — with a built-in limiter so a boost does not clip. Free, 100% in your browser.
Compress audio, songs and music files to a smaller size — choose how small, save as MP3, M4A or OGG, and see how much space you saved. Free, 100% in your browser.
Convert audio, songs and music files between MP3, WAV, M4A, AAC, OGG and FLAC — pick the quality from 64 to 320 kbps and download. Free, 100% in your browser.
Merge audio files, songs and music into one track — join MP3, WAV, M4A, OGG and FLAC in any order with no gap, and trim each clip first. Free, 100% in your browser.
Create a UPI payment QR code from your UPI ID — open or fixed amount, note and logo — and download PNG, SVG or a print-ready Scan & Pay poster. Free, 100% in your browser.
Upload a CSV or TSV file and get instant column statistics, a data quality score, correlation analysis, auto-generated insights, and both recommended and custom charts. Free, 100% client-side.
Fill a transparent image with white, black, or any custom background color, or drag it onto another photo and position it interactively. 100% client-side.
Upload a photo and extract its dominant colors as a ready-to-use palette — each color shown as HEX, RGB, its nearest color name, and roughly what percentage of the image it covers. Free, 100% client-side.
Paste a curl command and get a working ApiClient class in JavaScript (fetch or axios), Python (requests or the stdlib http.client), PHP (cURL or Guzzle), Go, Java, or C# — headers, body, and Basic auth all mapped correctly. Free, works entirely in your browser.
Build, test, and understand cron expressions — a plain-English description, the next 10 run times, and one-click presets. Supports both standard 5-field cron and 6-field Quartz syntax (with seconds). Free, works entirely in your browser.
Paste raw Protocol Buffers (protobuf) bytes as base64 or hex and see every field decoded — no .proto schema needed. Shows every plausible interpretation of each field, since the wire format alone can't say which one is correct.
Paste JSON and generate class or struct definitions in TypeScript, Java, Go, Python, C#, Kotlin, or C++ — with explicit control over field and class naming convention, and real nested-class generation. Free, works entirely in your browser.
Paste a Base64 string or data URI and get back a real, previewable, downloadable PDF file. Free, works entirely in your browser.
Convert a PDF file to a Base64 string, ready to embed in HTML, CSS, JSON, or an API payload. Free, works entirely in your browser.
Cycle your screen through full-screen white, black, red, green, blue, cyan, magenta, and yellow to spot dead or stuck pixels and check for backlight bleed. Free, works entirely in your browser.
Test your click speed (CPS) and double-click speed. Pick a duration, click as fast as you can, and see your live clicks-per-second. Free, works entirely in your browser.
Convert Markdown to a styled, paginated PDF — paste your content directly or upload a .md file. Supports tables, fenced code blocks with syntax highlighting, task lists, and strikethrough. Files are processed securely and deleted automatically after conversion.