Free Online Browser Tools: 71 Web Apps $0 | KorexTools

Convert all your iPhone or iPad (.heic / .heif) photos to standard JPG in one batch. No file limits, no watermarks, and zero cloud uploads.

Turn web-downloaded images (.webp or .jfif) into standard JPG files compatible with every desktop program and portal in milliseconds.

Cut your website and e-commerce image file sizes by up to 70% by converting JPG and PNG assets into next-gen WEBP format in 1 click.

Inspect camera, lens, date, and hidden GPS coordinates with a Google Maps link, and strip metadata instantly without uploading your photos.

Adjust width, height, or percentage scale across dozens of photos simultaneously while locking aspect ratio to prevent distortion.

Does a visa application, university portal, or government form require a photo under 100 KB or 200 KB? Set your exact limit and our algorithm hits it automatically.

Did the embassy or consular portal reject your photo for exceeding 50 KB? Our binary search algorithm lands strictly below 50 KB with sharp facial detail.

The ideal target for HR portals (Workday, LinkedIn, job boards) and e-commerce stores requiring sharp photos strictly under 200 KB.

Export vector logos, icons, and .svg illustrations into razor-sharp .png images with transparent backgrounds at any resolution scale.

Convert modern WEBP graphics to standard PNG with 100% alpha transparency preserved, processed locally without cloud uploads.

Reduce PNG image file weight by up to 80% by converting to next-gen WEBP with alpha transparency to boost your Core Web Vitals.

Transform JPG, JPEG, and photos into professional PDF documents ready to print or email, processed locally without server uploads.

Convert PNG images to universal JPEG format with smart white background filling to prevent transparent areas from turning black.

Decode Apple iPhone HEIC photos into lossless PNG format directly in your browser RAM with zero server uploads.

Turn photos, logos, and graphic illustrations into high-contrast visual negatives with adjustable intensity directly in your browser.

Transform any rectangular photo into a perfect circle with a transparent background ready for profile avatars, social media, and web design.

Blur and censor faces, vehicle license plates, ID numbers, or private text with adjustable block size with zero cloud uploads.

Transform next-gen AVIF pictures into universally compatible JPG files for any graphic editor, social network, or image viewer with zero server uploads.

Combine contracts, invoices, receipts, and PDF reports in the exact order you want without uploading confidential documents to any cloud server.

Separate every page of a PDF into standalone files or split by custom page ranges instantly inside your browser.

Click the exact page numbers you want to keep and generate a clean new PDF document containing only those sheets.

tuned internal object streams, strip bloated metadata, and reduce PDF document file sizes directly inside your browser.

Sign with your finger on mobile or mouse on desktop, choose ink color (black, legal blue, or dark ink), and download a clean transparent PNG ready for any document.

Stamp your handwritten signature or initials directly onto any contract, NDA, or invoice PDF without uploading confidential papers to remote cloud servers.

Remove blank pages, duplicate sheets, or confidential sections from any PDF document by visually picking them on a responsive thumbnail grid.

Fix upside-down scanned pages, flip portrait to landscape orientation, and rotate individual sheets or entire files in seconds.

Rearrange the sequence of pages in any PDF file visually with intuitive drag-and-drop or up/down controls before downloading.

Trim excessive whitespace from PDF sheets to tuned shipping labels, receipts, and documents for thermal printers and tablets.

Insert clean page numbers into the footer or header of any PDF document with custom formats ("Page X of Y") for legal briefs and books.

Stamp semi-transparent diagonal watermarks ("CONFIDENTIAL", "DRAFT", "SAMPLE") across all PDF pages to safeguard intellectual property.

Export every page from any PDF document as individual high-resolution JPG or PNG images bundled in a clean downloadable ZIP file.

Lock your sensitive contracts, bank statements, and payroll receipts with a secure password to prevent unauthorized reading.

Turn interactive form fields, checkmarks, signatures, and comments into fixed read-only pages to prevent tampering before legal submission.

Generate permanent QR codes for URLs, WhatsApp, Wi-Fi, vCard Contact Cards, Google Maps Location, Email, Phone Call, and SMS. Embed your logo and download as HD PNG or a ready-to-print US Letter PDF sheet.

Generate industry-standard barcodes (Code-128, EAN-13, CODE39) for retail inventory, products, and warehouses with instant PNG download or A4 sheet printing.

High-contrast giant countdown timer and stopwatch clearly visible from the back of any classroom, gym, or lecture hall with built-in audio alarm.

Create permanent static QR codes for restaurant menus, web pages, and printed brochures. Zero redirects, never expires, and 100% free.

Connect guests, customers, and team members to Wi-Fi instantly with phone cameras. Never recite long passwords again with total local security.

Enable prospects and customers to start WhatsApp conversations instantly without saving your phone number into their contacts.

Craft modern digital business cards: scanning prompts phones to open native contact address books with all details pre-filled and ready to save.

Read the contents of any QR code by uploading an image, pasting a clipboard screenshot, or using your computer webcam.

Design and generate complete adhesive label sheets on PDF ready to print on standard office laser or inkjet printers.

High-precision digital stopwatch with giant legible numerals, lap time splits, and distraction-free fullscreen mode.

Supercharge your study and work sessions with 25-minute deep focus intervals balanced by 5 and 15-minute restorative breaks.

Fix accidental Caps Lock text, switch between UPPERCASE, lowercase, Sentence case, or Title Case, and strip extra spaces in 1 click.

Paste your Original Text and Modified Text to instantly highlight which lines or words were added (green) and which were removed (red).

Type your phrase above and click any style (Cursive, Bold, Gothic, Bubble, Small Caps) to copy it instantly for your social media bio or captions.

Paste two columns of items, emails, or codes to compute items unique to List A, unique to List B, and shared matches in common instantly.

Clean text lists, email rosters, or inventories by automatically stripping all repeated lines and sorting unique records.

Reconstruct continuous paragraphs from fragmented text copied from PDFs or emails, replacing forced line breaks with spaces, commas, or custom delimiters.

Instantly calculate characters with and without spaces, words, sentences, paragraphs, and estimated reading time. Track exact limits for Twitter (280), Instagram Bio (150), TikTok, and SEO inside your browser.

Generate and copy blank invisible Unicode characters (Hangul Filler U+3164, Braille U+2800, and Zero-Width Space U+200B). Perfect for empty WhatsApp texts, invisible Free Fire nicknames, and clean Instagram bio line breaks.

Flip sentences upside down (180°), reverse characters in mirror effect, or reverse word order in real time. One-click copy for viral TikTok comments, Twitter posts, and gaming tags.

Convert standard text into horizontal strikethrough, double cross-out, underline, decorative waves, or circled bubble letters. One-click copy ready for WhatsApp, Instagram, and Facebook.

Convert text to international Morse code and decode dots and dashes to readable text instantly. Playback telegraphic audio beeps with customizable WPM speed and frequency via native Web Audio.

Strip HTML tags, attributes, scripts, styles, decode web entities, and remove Markdown syntax (headers, bolds, links) to obtain clean plain text ready for social media posts or Word docs.

Transform any title with accents, uppercase letters, and symbols into an SEO-tuned web slug with clean hyphens. Customize separators and filter stop words in real time.

Paste any long caption or transcript to instantly extract all hashtags (#) and mentions (@). Deduplicate, sort by frequency, and copy them separated by spaces or commas in one click.

Paste your JSON payload or drop a .json file to instantly transform it into an Excel-ready CSV spreadsheet without sending your sensitive data to any server.

Transform .csv files or pasted Excel tables into clean, formatted JSON object arrays in milliseconds inside your browser.

Drop any image or icon to instantly get its raw Base64 string, Data URI, ready-to-use HTML <img> tag, and CSS background-image snippet.

Paste your Base64 string (with or without the data:image prefix) to preview the image live, inspect pixel dimensions, and download it as JPG or PNG.

Paste or upload two JSON files or strings to detect semantic differences, added, removed, or altered keys with automatic recursive key sorting and syntax validation.

Paste your raw JSON payload to validate syntax with line and column error indicators. Beautify with 2 or 4 spaces or minify into a single line without uploading data to remote servers.

Encode any plain text string into Base64 format or decode Base64 strings to readable text in real time. Full international UTF-8 support handles accents and emojis direct.

Paste your JSON Web Token (JWT) to inspect Header algorithms, Payload claims, and Signature verification blocks. Automatically converts unix timestamps (exp, iat) into human dates without network transmission.

Convert special characters into safe percent-encoding (%20, %26, %3D) for URL parameters, or decode complex campaign strings into human-readable text in real time.

Transform XML documents into clean JSON or convert JSON structures back into formatted XML. Ideal for e-invoice auditing, RSS feeds, and legacy SOAP services without cloud uploads.

Generate cryptographic checksums (hashes) instantly for any text or file. Computes SHA-256, SHA-512, SHA-1, and MD5 via native browser Web Crypto API without uploading data.

Transform YAML files into structured JSON or convert JSON objects to clean YAML with strict 2-space indentation. Designed for Kubernetes manifests, Docker Compose, GitHub Actions, and OpenAPI Swagger.

Visualize deeply nested JSON payloads in a collapsible interactive hierarchy tree. Color-coded syntax highlights data types (strings, numbers, booleans, arrays) with live key searching.