Free PDF and document tools
From PDF conversion, editing, and signing to images and QR. No install or sign-up, and uploaded files are not stored after processing.
⭐ 자주 찾는 도구
방문자가 가장 많이 사용하는 도구 5가지
PDF conversion
Convert to and from PDF (images, Excel)
Word processors (Word & HWP)
Word (DOCX) and Hangul (HWP) conversion
Convert Word to PDF
Instantly convert DOC, DOCX, Excel, and PPT to PDF.
Convert Hangul (HWP) to PDF
Convert HWP & HWPX (Hancom Office) to PDF.
Convert Hangul (HWP) to Word
Turn HWP and HWPX into editable Word (DOCX).
Convert PDF to Word
Turn PDF text and tables into editable Word (DOCX).
Compare Hangul and Word documents (diff)
See the differences between two HWP or DOCX files in color.
Edit PDF
Merge · split · compress · rotate · watermark
Merge PDF
Drag to reorder multiple PDFs and merge into one.
Split PDF
Extract just the pages you want, or split into several files.
Rotate, reorder, and delete PDF pages
Drag thumbnails to reorder, rotate, or delete.
Compress PDF
Choose compression level; reduce file size while keeping quality.
PDF watermark & page numbers
Add a "Confidential" watermark and page numbers to every page.
PDF signing and security
E-signature, stamp, password & redaction
PDF signing and text fill
Fill in text, handwritten signatures, stamps, and images directly, then submit.
Create a stamp (seal) image
Create name stamps, round seals, and corporate seals as transparent PNGs.
Set or remove PDF password
Add or remove an open password on a PDF.
Hide personal info in PDFs (redaction)
Redact ID numbers, account numbers, and more at the data level (black-out).
Image tools
Document scan, HEIC conversion, image compression, ID photos
Document scanner (photo → PDF)
Flatten and whiten scanned paper into a PDF. No watermark.
Convert HEIC to JPG (iPhone)
Convert iPhone photos (HEIC) to JPG (batch or PDF).
Shrink & resize images
Auto-compress to your target size (MB) at the highest possible quality.
Make an ID photo
Passport, visa, and ID photo sizes plus print layout.
Remove photo EXIF (location data)
Remove location and device metadata.
Favicon generator
Turn an image into a favicon.ico and PNG set.
PDF to image (JPG, PNG)
Convert PDF pages to images.
Crop & rotate images
Crop, rotate 90 degrees, and flip.
Make a GIF from images
Turn several photos into an animated GIF.
Extract image color palette
Extract dominant colors (HEX).
WebP conversion
Image ↔ WebP / JPG / PNG.
Image to Base64
Embed in CSS/HTML as a Data URI.
Handy tools
QR · URL shortener · VAT · character count · file transfer
Create a QR code
Turn a URL or text into a QR code image (PNG).
Wi-Fi & contact QR codes
WiFi auto-connect and business card (vCard) QR codes.
Scan & read QR codes
Extract content (URL or text) from a QR image or photo.
URL shortener & short links
Shorten long links + auto-generate a QR code.
UTM builder (campaign tracking URLs)
Build tracking URLs for GA4 and Naver Ads.
VAT calculator
Auto-calculate net amount and VAT (10%).
Special character and emoji picker
Click to insert & copy ※★→℃① 😀.
Character counter (essays, assignments)
Live count of characters (with or without spaces), words, and bytes.
Large file transfer (one-time link)
Create a download link that auto-deletes after 24 hours.
Barcode generator
Code128, EAN, UPC, and ISBN barcodes.
Password generator
Secure random passwords with strength meter.
Manuscript sheet counter
Character count to 200-char manuscript sheets.
Everyday calculators
Age · date · lunar calendar · time · floor area · BMI · scientific
International age calculator
Find your international age, year age, Korean age, and zodiac sign from your birth date.
Date calculator and D-day
Days between two dates, and dates a few days before or after.
Lunar ↔ Solar calendar converter
Convert between solar and lunar dates, sexagenary cycle, and leap months.
Lunar birthdays, 60th and 70th celebrations (parents' birthdays)
Solar date for a lunar birthday, plus 60th, 70th, and 80th birthday celebration dates.
Floor area calculator (pyeong ↔ m²)
Instantly convert between pyeong and square meters.
Percentage calculator
Calculate percentage of total, ratio, and rate of change.
Unit converter
Convert length, weight, area, volume, and temperature.
Time calculator
Add or subtract time, convert minutes and hours.
BMI calculator
Body mass index and obesity level from height and weight.
Basal metabolic rate (BMR) & calories
Calculate daily recommended calories (TDEE).
Scientific calculator
Supports trig functions, logarithms, square roots, and π.
Financial calculator
Take-home pay, loans, savings, severance, discounts, real estate
Take-home salary calculator
Monthly take-home pay after insurance and tax deductions.
Loan interest calculator
Monthly payment and total interest for equal-payment and equal-principal loans.
Savings & deposit interest calculator
Maturity amount (simple interest, compound interest, tax).
Severance pay calculator
Severance pay based on average wage and length of service.
Discount calculator
Calculate discounted price and discount rate.
Jeonse-to-monthly-rent conversion calculator
Convert between jeonse and monthly rent using the conversion rate.
VAT calculator
Auto-calculate net amount and VAT (10%).
Real estate yield calculator
Calculate monthly rental yield and net investment.
Developer tools
diff · JSON · Base64 · JWT · hash · regex · color · number base
Text compare (diff)
Compare two texts or code blocks line by line.
JSON formatter & validator
Format, minify, and check JSON for syntax errors.
Base64 encode & decode
Text to/from Base64 (supports Korean).
URL encode & decode
Percent-encoding (%XX) conversion.
JWT decoder
Check token header, payload, and expiration.
Hash generator (SHA)
SHA-1 / 256 / 384 / 512 hashes.
Unix timestamp converter
Timestamp to/from date (local and UTC).
Regex tester
Highlight and count regex pattern matches.
UUID generator
Bulk-generate random UUID v4.
Text transform & cleanup
Change case, camelCase, snake_case, and clean up lines.
Color converter (HEX, RGB, HSL)
Color picker and color code converter.
Base converter (binary, octal, hex)
Real-time binary, octal, decimal, and hex conversion.
CSV to JSON converter
Table data to/from JSON array.
Markdown to HTML
Real-time Markdown preview.
Unicode & emoji info
Code points, UTF-8, and HTML entities.
Dummy text (Lorem Ipsum)
Generate placeholder filler text for mockups.
YAML to JSON converter
Convert config files (compose, k8s).
SQL formatter
Format SQL and uppercase keywords.
XML formatter & XML to JSON
Format XML and convert to JSON.
Cron expression parser
Explain a cron schedule in plain language.
URL slug generator
Title to URL slug (romanized or Korean).
Table to Markdown table
Excel / CSV → Markdown table.
Strip HTML tags
Extract plain text from HTML.
HMAC generator
HMAC-SHA256 from a message and key.
JWT generator (signing)
Build an HS256 JWT from a payload and key.
bcrypt hash generate & verify
Create and compare password hashes.
File hash (checksum)
Verify file integrity with MD5 and SHA-256.
Text encryption (AES-256)
Encrypt and decrypt with a password.
Morse code converter
Text to/from Morse code (·−).
Caesar cipher & ROT13
Alphabet shift cipher.
World time converter
Time difference between Korean and overseas cities.
Roman numeral converter
Arabic ↔ Roman numerals.
HTTP status code reference
Look up the meaning of 200, 404, 500, and more.
MIME type lookup
Content-Type by file extension.
User-Agent parser
Analyze browser, OS, and device.
Query string to/from JSON
URL query ↔ JSON conversion.
Fix garbled Korean text (encoding)
Auto-detect text encoding and recover to UTF-8.
Korea-specific & forms
Amount in Korean/Chinese characters · business/ID number · romanization
Amount to Korean words (formal contract notation)
Convert numeric amounts to Korean text for contracts.
Numbers to Chinese characters (formal numerals)
Write certificate amounts in Chinese numerals (一二三 / 壹貳參).
Business registration number validation
Validate format with a checksum.
Resident registration number validation and analysis
Check the format and extract date of birth and gender.
Hangul → romanization
Romanize names and addresses for passports.
Sign your document in one go
Collect e-signatures on your converted and finished documents for free. The other party signs without signing up.
Start free e-signature →