Free Online Tools

Convert PNG images to JPG format instantly. Free, fast, and works right in your browser with no uploads to any server. Reduce file size by up to 90% with adjustable quality settings.

Compress PNG, JPG, and WebP images instantly in your browser. Reduce file sizes by up to 80% with an adjustable quality slider. Free, private — images never leave your device.

Resize images to any dimension online for free. Maintain aspect ratio or set custom width and height. Platform presets for Instagram, Facebook, Twitter, YouTube, and LinkedIn. Fast browser-based tool, no upload needed.

Convert HEIC photos from iPhone to JPG format instantly in your browser. No upload required — your photos never leave your device. Supports .heic and .heif files with adjustable quality output.

Convert WebP images to PNG or JPG format instantly in your browser. Fully preserves alpha transparency when converting to PNG. Free, private, no uploads needed.

Convert SVG vector graphics to PNG at 1x, 2x, 3x, or 4x resolution for Retina and HiDPI displays. Upload an SVG file or paste SVG code directly. Choose transparent or white background. Free, private, browser-based — no uploads, no server.

Combine multiple images into a single PDF document with custom page size, orientation, and margins. Supports PNG, JPG, and WebP. Free, no signup, processed entirely in your browser.

Convert JPG images to lossless PNG format instantly in your browser. No uploads, no quality loss on conversion, full transparency support. Free forever.

Crop images online for free. Drag to select any region, choose preset aspect ratios like 1:1, 16:9, 4:3, 3:2, or 9:16. Enter custom dimensions, export as PNG or JPG. Browser-based — your images never leave your device.

View and remove EXIF metadata from JPG images instantly in your browser. Inspect GPS coordinates, camera make/model, ISO, aperture, shutter speed, and timestamp. Strip all EXIF data for privacy before sharing. Free, private — images never leave your device.

Rotate images online for free. Quick buttons for 90°, 180°, 270°, flip horizontal/vertical, or enter any custom angle from -180° to 180°. Works with PNG, JPG, and WebP in your browser — no uploads, no signup.

Change the opacity of any image instantly in your browser. Adjust transparency from 0–100%, preview live on a checkerboard background, and download as PNG with full alpha channel preserved. Free, private — no uploads to any server.

Format, beautify, and minify JSON data with real-time validation. Configurable indentation (2/4/tab), instant error detection, copy and download. Free online JSON formatter for developers.

Decode and inspect JSON Web Tokens instantly. View color-coded header, payload, and signature. Check token expiration, claims, and algorithm — all in your browser. Free, private, no data sent to any server.

Encode text to Base64 or decode Base64 strings back to text instantly. Supports full UTF-8 for international characters and emoji. Free, private, runs entirely in your browser.

Encode text to URL-safe percent-encoding or decode percent-encoded strings instantly. Supports encodeURI, encodeURIComponent, and RFC 3986. Free, private, browser-based.

Encode special characters to HTML entities or decode entities back to text. Prevent XSS attacks and display code safely. Free, instant, browser-based.

Convert text to Morse code or decode Morse back to text instantly. Hear audio playback with Web Audio API. Supports A-Z, 0-9, and punctuation. Free online translator.

Convert numbers between binary, octal, decimal, hex, and base36 instantly. Bit visualization, copy per row, custom base 2-36. Free online developer tool.

Encode or decode text with ROT13 and ROT-N Caesar ciphers instantly. Adjustable rotation 1-25, visual cipher wheel, self-inverse. Free, private, browser-based.

Encrypt and decrypt text with AES-256-GCM using a password you choose. All processing happens in your browser via the Web Crypto API — your data never leaves your device. Try it free.

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files instantly. All processing in your browser via Web Crypto API — try it free, no signup.

Test regular expressions against text in real time with instant match highlighting. See all matches, capture groups, indices, and group names. Supports JavaScript regex flags g, i, m, s, u. Free online regex debugger for developers.

Build cron expressions visually with a 5-field editor. Preview next 5 run times instantly. Common presets, syntax guide, and copy to clipboard. Free online cron tool.

Build beautiful CSS gradients visually with a live preview. Supports linear, radial, and conic gradients with unlimited color stops, precise angle control, hex input, position percentages, preset gallery, randomizer, and one-click CSS copy. Free online gradient maker for web developers and designers.

Pick any color visually, convert between HEX, RGB, HSL, CMYK, and HSB instantly. Generate palettes and check WCAG contrast. Free online color tool.

Convert Unix timestamps to human-readable dates and ISO 8601 format instantly. Live clock, 14+ timezones, reverse date-to-timestamp mode. Free, runs in your browser.

Compare two blocks of text side by side instantly. See added lines highlighted green, deleted lines red, and unchanged lines gray. Line numbers on both sides, ignore-whitespace toggle, case-insensitive option. Free, private, runs in your browser.

Count words, characters (with and without spaces), sentences, paragraphs, reading time, speaking time, and top keywords in real time. Free word counter for writers, students, and SEO professionals.

Count characters (with and without spaces), words, UTF-8 bytes, and lines in real time. Check Twitter, SMS, meta description, and URL slug limits instantly. Free, no signup.

Convert any title or text into clean, SEO-friendly URL slugs instantly. Supports Vietnamese, multilingual transliteration, bulk mode, and custom separators. Try it free now.

Convert text between 11 case formats: UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, kebab-case, and more. Instant copy, free, no signup.

Generate 20+ fancy Unicode text styles instantly: bold, italic, script, fraktur, bubble, small caps, and more. Copy and paste into Instagram, Twitter, Discord, and TikTok bios.

Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words. Copy classic Latin filler text instantly for wireframes, mockups, and typography testing.

Convert text to natural speech in your browser with 100+ voices, adjustable speed, pitch, and volume. Free TTS tool using Web Speech API — no signup, fully private.

Find and replace text online with regex support, case-sensitive matching, whole-word search, and highlighted matches. See match count and replace all or one at a time. Free browser-based tool for writers, developers, and data analysts.

Remove duplicate lines from any text instantly. Case-sensitive or case-insensitive matching, trim whitespace, sort output, keep first or last occurrence. Before/after comparison with stats. Free, browser-based, no signup.

Reverse text character by character, reverse word order, reverse line order, or create upside-down mirror text. 4 modes with real-time output, Unicode-safe, one-click copy. Free, no signup, processed in your browser.

Encode text to Unicode escape sequences (\uXXXX, U+XXXX, HTML entities, UTF-8 hex) and decode them back to readable text. Supports the full Unicode range including emoji, CJK, Vietnamese diacritics, and all scripts. Free, instant, runs entirely in your browser.

Detect and remove invisible Unicode characters in text: zero-width spaces (ZWSP), joiners (ZWNJ/ZWJ), byte order marks (BOM), RTL/LTR overrides, soft hyphens, non-breaking spaces, and 20+ hidden character types. Each type is color-highlighted with a label, codepoint, and risk level. Free, instant, private — no data leaves your browser.

Split text by any delimiter, or join multiple lines with a custom separator. Two modes in one tool. Supports regex delimiters for advanced splitting.

Convert currency amounts to written text in English and Vietnamese. Supports USD, VND, EUR, GBP with lowercase, Title Case, and UPPERCASE output. Real-time conversion for checks, invoices, and legal documents.

Calculate percentages instantly with 3 modes: find X% of Y, find what percent X is of Y, or calculate percentage change between two values. Real-time results, quick presets for discounts, tips, and taxes. Free online percentage calculator — no signup required.

Calculate your exact age in years, months, days, weeks, and hours. Get your zodiac sign, Chinese zodiac, Korean age, generation, next birthday countdown, and day-count milestones. Free and instant.

Calculate monthly loan payments, total interest, and amortization schedules for any loan amount and term. Compare mortgage, car, and personal loan offers side by side instantly.

Calculate your Body Mass Index (BMI) instantly using metric (kg/cm) or imperial (lbs/ft) units. See your BMI category with a visual gauge, healthy weight range, and bilingual explanations. Free, no signup needed.

Calculate tip amount, total bill, and per-person split instantly. Choose from preset tip percentages (10%–25%) with quality labels, use the 0–30% slider, split among 1–20 people, and toggle round-up. Includes tipping guides by country and service type.

Convert between 50+ units across 8 categories: length, weight, temperature, volume, area, speed, time, and data storage. Instant real-time results with swap and copy.

Free compound interest calculator with monthly contributions, growth chart, and scenario presets. See how your investments grow over time — start planning now.

Check WCAG 2.1 color contrast ratio between foreground and background colors instantly. See AA and AAA pass or fail badges for normal text, large text, and UI components. Live text preview at multiple sizes, color picker with hex input, swap colors, and copy results. Free online accessibility checker — no signup required.

Generate custom QR codes for URLs, text, WiFi, and vCard contacts. Customize colors, choose error correction level, download as PNG or SVG. 100% free, no signup.

Generate strong, random passwords with customizable length and character types. Uses Web Crypto API for true cryptographic randomness in your browser. Free, no signup, no data stored.

Generate UUID v4 identifiers instantly. Create single or bulk UUIDs for development and testing. Uses the Web Crypto API for true random generation.

Generate SEO-optimized meta tags, Open Graph, and Twitter Card markup with a live Google search preview and social media preview. Copy ready-to-use HTML code for your website. Free, instant, no signup.

Create favicons from text, emoji, or uploaded images. Download all sizes as a ZIP with ready-to-use HTML link tags. Supports PWA and Apple Touch.

Create a perfect Facebook cover photo, post image, or event banner at exact dimensions. Free browser-based editor with no upload to any external server.

Design eye-catching YouTube thumbnails at the ideal 1280 by 720 pixel resolution. Add text, upload your image, and download the result in seconds.

Create a professional YouTube channel art banner at 2560 by 1440 pixels with the correct safe zone (1546×423 px). Design once, display perfectly on TV, desktop, tablet, and mobile. Upload background, add text and logo, preview across devices, and download in PNG or JPG. Free, no signup, no watermark.

Create Instagram square posts at 1080 by 1080 and vertical story images at 1080 by 1920 with text overlays. Free tool with no watermark added.

Design a Twitter/X profile header at 1500 by 500 and post image at 1600 by 900 with custom text and backgrounds. Free, browser-based editor tool.

Create a professional LinkedIn profile cover at 1584 by 396 or post image at 1200 by 627 to enhance your personal brand. Free with no watermark.

Design TikTok profile and video cover images at 1080 by 1920 pixels. Vertical format ready for the TikTok feed. Free online editor, no watermark.

Create Pinterest pins at the ideal 1000 by 1500 pixel ratio of two to three. Add text overlays and download ready to pin. Free with no watermark.

Place your app screenshots inside realistic device frames for App Store and Google Play listings. Supports iPhone, iPad, Pixel, and Samsung models.

Merge multiple PDF files into one document. Drag to reorder pages before merging. Free and private, processed entirely in your browser with no uploads. No file limit, no watermarks.

Split PDF files by page range, select specific pages, or split every N pages. Preview pages before extracting. Download as PDF or ZIP. 100% browser-based — files never leave your device.

Convert every page of a PDF to high-quality PNG images. Choose 72, 150, or 300 DPI. Download pages individually or all at once as a ZIP. Browser-based — files never leave your device.

Convert multiple images into a single PDF document. Drag to reorder pages, choose A4/Letter/Legal page size, set margins and quality. Free, private — processed entirely in your browser.

Rotate all pages or individual pages of a PDF by 90, 180, or 270 degrees. Visual page thumbnails let you preview rotation before downloading. Fix scanned documents, mixed-orientation PDFs, and upside-down pages. Free, browser-based — no upload needed.

Add password protection and permission restrictions to any PDF file. Set user password to restrict opening and owner password to control printing, copying, and editing. Choose 128-bit or 256-bit AES encryption. 100% browser-based — files never leave your device.

Convert any video clip to an animated GIF online. Set time range, FPS, width, and export instantly. 100% browser-based, no upload needed.

Cut your video to the exact segment you need. Upload, set start and end times with a visual timeline, trim in-browser, and download the result instantly.

Compress video files online for free. Reduce file size by 50-85% with adjustable quality presets (Low, Medium, High, Custom). Browser-based processing — no upload to any server. Supports MP4, WebM, MOV, AVI. Real-time estimated output size and before/after comparison.

Fix sideways or upside-down video by rotating 90°, 180°, or 270° and flipping horizontally or vertically. Live preview, processed in your browser with Canvas API. No server upload needed.

Speed up or slow down your video from 0.25x to 4x. Audio pitch is corrected automatically using the atempo filter. Fully browser-based processing.

Speed up or slow down any animated GIF by adjusting frame delay timing. Use the speed slider (0.25x-3x), preview frame-by-frame, and download the modified GIF instantly. 100% browser-based, no server upload, no watermark.

Extract audio from any video file instantly in your browser. Save as WAV, convert to MP3 or OGG later. 100% private, no upload needed.

Convert audio files between MP3, WAV, OGG, FLAC, and AAC formats instantly in your browser. Adjust bitrate, sample rate, and channels. Free, private, no signup.

Trim any audio file to a precise start and end time with visual waveform editing. Supports MP3, WAV, OGG, AAC, M4A, and FLAC. Drag markers on the waveform, preview your selection, and download trimmed WAV. 100% browser-based, no uploads, completely private.

Convert CSV to JSON online with real-time preview. Supports comma, semicolon, tab, and pipe delimiters. 3 output formats. Free, private, runs in your browser.

Convert CSV to well-formed XML with configurable root and row element names, delimiter support, and proper escaping. Free browser-based tool — no upload needed.

Convert JSON objects and arrays to well-formed XML instantly. Bidirectional: also convert XML back to JSON. Handles nested objects, arrays, special characters, and custom root elements. Free, private, browser-based.

Convert JSON to YAML and YAML to JSON instantly. Bidirectional converter with indent control, key sorting, and sample configs. Free, private, browser-based.

Format and validate XML online with syntax highlighting, configurable indentation (2/3/4 spaces), and real-time error detection. Switch between prettify and minify modes. Uses the browser's native DOMParser — free, private, no data leaves your device.

Validate JSON syntax instantly and see the exact error with line and column numbers. Format (pretty-print) or minify valid JSON. Free, private, runs entirely in your browser.

Minify JSON online by removing all whitespace and indentation. Shows before/after size comparison with savings percentage. Validates JSON before compressing to guarantee valid output. Includes prettify mode, download, and copy. Free, private, runs entirely in your browser.

Compare two JSON objects side-by-side and highlight structural differences. Added lines in green, removed in red. Normalizes key order for accuracy.

Create professional invoices online with your company branding. Add line items, calculate taxes, and export as PDF. Free, no account needed at all.

Generate a free privacy policy for your website or app in minutes. Covers GDPR, cookies, third-party services, and data collection disclosure clauses.

Interactive lookup for Vietnam's 2026 province merger. Search old or new province names, see merger details, administrative centers, population and area data. Based on Resolution 202/2025/QH15.

Complete FIFA World Cup 2026 schedule with all 48 teams, 12 groups, match times in Vietnam timezone (UTC+7). Filter by team, view Asian teams breakdown, countdown to kickoff.

Calculate gold prices in Vietnam. Convert grams to taels, get SJC and Ring 9999 buy/sell prices. Supports 24K, 18K, 14K gold with unit conversion. Free online gold price calculator.

Calculate stock profit and loss for Vietnamese stocks. Includes 0.15% brokerage fee + 0.1% selling tax. See net P&L, ROI%, break-even price in VND. Free stock profit calculator.

Calculate cryptocurrency profit and loss with DCA (Dollar Cost Averaging) strategy. Simulate Bitcoin investment returns over time. Compare lump-sum vs DCA, factor in exchange fees and taxes. Free crypto calculator.

Estimate your monthly fuel costs in Vietnam. Enter daily km and fuel consumption to see daily, weekly, and monthly expenses with RON95, E5 RON92, and Diesel prices. Free fuel cost calculator with vehicle presets.

Convert between 12 currencies instantly: USD, VND, EUR, GBP, JPY, CNY and more. Compare bank rates, swap currencies in one click. Free exchange rate calculator.