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Find web tools by purpose, including text, images, GIF, PDF, HWP, Office documents, archive files, calculators, and unit converters.
PNG Image Compressor
Reduce PNG file sizes directly in your browser without uploading images to a server.
JPEG/JPG Image Compressor
Reduce JPEG and JPG file sizes directly in your browser without uploading images to a server.
WebP Image Converter
Batch convert WebP images to JPG or PNG quickly and securely in your browser without uploading them to an external server.
HEIC/HEIF Image Converter
Batch convert HEIC/HEIF images to high-quality JPG or PNG quickly and securely in your browser without uploading them to an external server.
AVIF Image Converter
Batch convert AVIF images to high-quality JPG or PNG quickly in your browser without uploading them to a server.
Image Resizer and Format Converter
Resize images by pixels, percentage, or longest edge using presets for popular social media and web sizes, and convert them to JPEG, PNG, WebP, AVIF, and other formats.
PNG Sprite Cutter
Split sprites and sticker sheet images containing multiple characters and icons into individual transparent PNGs.
GIF / Animated WebP Maker
Safely create animated GIF or Animated WebP files from multiple images.
GIF Compressor
Maximize reduction of GIF animation file size directly within your web browser.
GIF ↔ WEBP Converter
Convert GIF to WEBP and WEBP to GIF safely and quickly directly in your browser.
Image to PDF Converter
Merge multiple images into a single PDF or convert them into separate PDF files directly in your browser without uploading them to an external server.
PDF Compressor
Reduce PDF file size as much as possible safely in your browser without uploading the file to a server.
PDF to JPG Converter
Convert PDF documents to high-quality JPG images quickly and conveniently directly in your web browser.
PDF Merger
Merge multiple PDF documents and JPG images into a single PDF file directly in your browser without uploading to a server.
PDF Splitter
Extract and split PDF documents by custom page ranges, every N pages, or into individual pages.
PDF Organizer
Reorganize, rotate, and delete PDF pages freely with drag-and-drop directly in your browser.
PDF Unlock
Verify passwords, unlock (decrypt) encrypted PDF files, and save them in original quality.
Protect PDF with Password
Set a password for your PDF document and encrypt it with 256-bit AES security.
HWP/HWPX Document Viewer
Open HWP and HWPX documents securely in your browser without server uploads, and select or copy text with this local-only viewer.
HWPX Document Compressor
Optimize and recompress images in HWPX documents 100% inside your browser without server transfers, dramatically reducing file size.
DOCX Document Compressor
Optimize images inside Word (DOCX) documents directly in your browser to significantly reduce file size.
PPTX Document Compressor
Optimize images inside PowerPoint (PPTX) documents directly in your browser to significantly reduce file size.
XLSX Document Compressor
Optimize images in XLSX (Excel) documents directly inside your browser to reduce file size.
Math Expression Calculator
Textbook-style math expression calculator for middle and high school students that calculates fractions, powers, trigonometric functions, and more in textbook format.
Percentage Calculator
View and calculate four practical percentage calculations for everyday use in one place.
Loan Interest Calculator
Accurately calculates monthly payments and total interest for equal principal & interest, equal principal, and bullet repayment methods.
Salary Calculator
Calculates actual take-home pay by reflecting tax-free income and the number of dependents when entering annual salary.
Part-Time Wage Calculator
Calculates weekly holiday allowance and extra pay for night, overtime, and holiday work based on the 2026 minimum wage (10,320 KRW).
VAT Calculator
Supports calculation by supply amount, reverse calculation from total amount, estimated sales/purchase tax payable, and bulk calculation for multiple items.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable date/time formats. Also shows the current timestamp.
Date Calculator
Calculates the number of days between two dates, dates before/after specific days, and couple/anniversary dates.
URL Encoder / Decoder
Percent-encode strings for URLs, or decode encoded strings back to plain text.
Base64 Text Encoder / Decoder
Encode text into Base64 format, or decode Base64 strings back to plain text.
Base64 Image Converter
Convert image files to Base64 strings, or restore Base64 data back to images.
Base64 File Converter
Convert any file to a Base64 string, or restore Base64 data back to the original file.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes at once using any of 39 text encodings, including UTF-8 and EUC-KR.
UUID Generator
Generate UUID v1, v4, v7, GUID, ULID, NIL, and other unique identifier formats, then copy them instantly.
QR Code Generator
Quickly create QR codes for URLs, Wi-Fi, text, contacts, locations, and more.
Text Editor
Edit multiple documents in tabs with undo, redo, save, find and replace, and go-to-line features.
Text Diff
Analyze and compare differences between two texts by line, word, character, or sentence.
Text Utilities
Clean text by removing spaces, line breaks, duplicate lines, special characters, and HTML tags; change letter case, sort lines, and analyze character and byte counts in real time - all in one place.
SMI to SRT Subtitle Converter & Sync Adjuster
Convert SMI/SAMI subtitles to standard SRT format and adjust timecode sync (in seconds) for SMI/SRT subtitles.
File Security Analysis
Analyze files for malware, phishing, tampering, and disguised extensions using file signatures (magic numbers) and metadata.
Photo Privacy Checker & Remover
Safely view personal information embedded in photos and remove it easily in your browser without uploading files to a server.
My IP Address Info
Check your public IP, geolocation map (country, city, lat/long), ISP/ASN, and device connection environment.
Live Radio Streaming
Listen to high-quality live radio channels from KBS, MBC, SBS, and more, with play/pause, volume control, and auto-restoration of recently listened channels.
Code Highlighter
Apply syntax highlighting to source code and convert it to HTML. Paste directly into external editors like blog platforms.
Code Formatter
Format and beautify source code in HTML, XML, CSS, JavaScript, JSON, and other formats for improved readability.
HTML Formatter
Open the HTML tab directly to format and indent HTML source code.
XML Formatter
Open the XML tab directly to format and indent XML document structures.
CSS Formatter
Open the CSS tab directly to organize stylesheets into a consistent, readable format.
JavaScript Formatter
Open the JavaScript tab directly to format code and improve readability.
JSON Formatter
Open the JSON tab directly to format and indent JSON data.
JSON Viewer
Format and indent JSON data for readability, and explore its structure.
JSON Editor
Edit, format, validate, and sort your JSON data.
JSON Diff
Compare two JSON datasets to identify added, removed, and changed items, including type differences.
Length
Automatically convert 13 length units (Metric, Imperial, Traditional Korean/East Asian, Nautical, etc.) in real time upon input.
Area
Automatically convert 11 area units (Square Meters (m²), Pyeong, Acres, Hectares, etc.) in real time upon input.
Weight
Convert 12 weight units (Metric: kg, g, mg, t, kt; Imperial: lb, oz, gr; Traditional: don, nyang, geun, gwan) in real time.
Volume
Convert 15 volume units (Metric: ℓ, ㎖, cc, ㎗, m³, cm³; Imperial: gal, bbl, oz, in³, ft³, yd³; Traditional: hop, doe, mal) in real time.