Blog
Smart ways to use e-signatures, PDFs, office documents and free tools.
How to Use Word's Track Changes and Comments for Document Review
When multiple people edit the same Word document, it's hard to know who changed what. Track Changes, comments, and document comparison make collaborative review transparent and efficient.
How to Auto-Generate a Table of Contents in Word — Heading Styles in One Step
Stop typing your Word table of contents by hand. Apply Heading styles, insert an automatic TOC from the References tab, and page numbers fill in themselves.
Word Page Numbering — Start Page 1 from Body, Skip Cover & Table of Contents
A practical office guide to excluding the cover page and table of contents from page numbering in Microsoft Word. Step-by-step: section breaks, unlinking headers, and setting the start number.
Word Mail Merge Guide — Create Hundreds of Personalized Documents from an Excel List
Connect an Excel contact list to a Word template and auto-generate letters, labels, and envelopes with each person's name and address. Step-by-step guide, free.
How to Recover an Unsaved Word Document + Set Up AutoSave
Lost hours of work because you closed Word without saving? Here's how to recover unsaved documents and configure AutoRecover so it never happens again.
How to Convert WebP — JPG·PNG ↔ WebP for Free
How to convert images to the smaller WebP format, or turn a WebP that won't open back into JPG·PNG. Improve website speed and fix compatibility in one place. Free, no install or sign-up.
How to Validate a Korean Business Registration Number — Free Format & Checksum Check
Instantly verify whether a Korean business registration number has the correct 10-digit format and checksum. Free tool by FreeSign — no login required. Note: format check only, not a live registry lookup.
How to Shorten a URL — Short Links + Automatic QR Code
Turn long URLs into short, shareable links and generate a QR code at the same time. Free, no install, no sign-up required. Perfect for business cards, posters, and SMS.
Unit Converter — Length, Weight, Area, Volume & Temperature
Convert inches to cm, pounds to kg, pyeong to ㎡, cups to ml, and Fahrenheit to Celsius instantly. Free unit converter — no install, no sign-up needed.
Time Calculator — Add & Subtract Time, Convert Minutes to Hours, Find Time Between Two Clocks
Add or subtract hours and minutes, convert minutes to hours, or find the difference between two times. Free online time calculator — no install, no sign-up required.
Savings & Deposit Interest Calculator — How to Calculate Maturity Interest (Simple & Compound, 15.4% Tax)
Wondering how much you'll actually receive when your savings account or fixed deposit matures? Here's how to calculate maturity interest with simple or compound interest, after the 15.4% withholding tax. Free.
How to Remove EXIF Data from Photos — Strip GPS Location & Device Info
Smartphone photos secretly store GPS coordinates, device model, and timestamps. Learn how to remove EXIF metadata before sharing on social media or resale marketplaces — free, no signup.
Pyeong to Square Meter Calculator — Korean Area Unit Conversion
Confused by ㎡ listings in Korean real estate? Learn how to convert pyeong ↔ m² instantly. Includes conversion formula, apartment size chart, and FAQ.
How to Prevent Font Corruption — Keep Documents Looking Right When You Send Them
Why fonts break and lines shift when you send a document — and how converting to PDF fixes it permanently. A practical office tip for Word, HWP, Excel, and PowerPoint.
How to Convert PowerPoint (PPT) to PDF — Sharing, Printing & Handouts
Converting PPT to PDF locks fonts and layout so slides look identical on any device. Step-by-step guide for PowerPoint's export feature, handout options, and instant online conversion — no install needed.
How to Save PowerPoint Slides as Images (JPG & PNG)
Step-by-step guide to exporting PowerPoint slides as JPG or PNG images for blogs, social media, and card news. Includes the PDF-to-image route for higher resolution or when PowerPoint isn't available.
How to Convert PDF to Images — Extract Pages as JPG or PNG for Free
Turn each PDF page into a JPG or PNG image file — perfect for blog thumbnails, presentation slides, or quick sharing. No install or sign-up required. Multiple pages download as a ZIP.
Free Random Password Generator — Create Strong Passwords Instantly
Reusing the same password across sites is how accounts get hacked. Generate a strong, random password in seconds — choose length, uppercase, lowercase, numbers, and symbols. Free, no install, no sign-up.
How to Convert Numbers to Hanja (Formal Chinese Numerals) — Amount Notation for Contracts & Deeds
What are 갖은자 formal Hanja numerals (壹貳參…), why contracts and promissory notes use them to prevent fraud, and how to convert any number in 2 steps. Free tool, no signup.
Hwangap, Chilsun, Palsun — What Ages Are They? Korean Milestone Birthday Chart
How old are 환갑(60)·진갑(61)·칠순(70)·희수(77)·팔순(80)·미수(88)·구순(90)? A Korean longevity-celebration (수연) age chart by Korean age, plus how to find the solar date of a lunar birthday. Free.
Barcode Generator — Create Code128, EAN, UPC & ISBN Barcodes Free
Generate barcodes for products, inventory, and books in seconds. Supports Code128, EAN-13, UPC-A, and ISBN. Free, no install, no sign-up — download PNG instantly.
Lunar ↔ Solar Date Converter — Today's Lunar Date, Zodiac & Leap Month
Convert any date between the Korean lunar calendar and the Gregorian (solar) calendar. See the Chinese zodiac sign (띠), 60-year cycle (간지), and leap-month status in one step. Free, no sign-up.
Korean Name Romanization — How to Write Your Name for Passports & Overseas Cards
How to correctly romanize Korean names for passports, flight tickets, and overseas credit cards. Rules on hyphens, name order, and consistency — with examples like Hong Gil-dong. Free conversion tool included.
Jeonse-to-Wolse Conversion Calculator — How Much Rent When Switching from Full Deposit?
How to calculate the right monthly rent when converting part of a jeonse deposit to wolse. Covers the conversion rate formula, a 2-step method, and a worked example.
How to Add a Stamp or Signature to Word, HWP, or PDF — No Scanner Needed
Skip the print-stamp-scan loop. Use a transparent PNG stamp to add a seal or signature cleanly to Word, HWP, and PDF documents. Step-by-step guide with FreeSign's stamp generator and PDF fill & sign tool.
Image Crop & Rotate — Free Online Crop, 90° Rotate & Flip Tool
Crop photos to the right aspect ratio or fix sideways and upside-down shots in seconds. Crop, 90° rotate, and horizontal/vertical flip — free, no install, no sign-up.
Convert HWP to DOCX — Edit Hwp Files With Colleagues Who Don't Have Hancom Office
If a colleague or overseas partner can't open your HWP file, convert it to DOCX so they can edit it in Word or Google Docs — no Hancom Office needed. Free, no installation required.
HWP Image Layout Explained — What "Treat as Character" Really Means
Why images jump to unexpected positions when you edit text in 한글 (HWP), and how to fix it. A practical guide to all four image layout modes: wrap, block, overlay, and inline (treat as character).
Fix Table Page Break Issues in Hangul (HWP) & Word — Cells Splitting & Missing Header Rows
Step-by-step guide to stop table cells from splitting across pages and repeat header rows on every page in Hangul (HWP) and Microsoft Word. Finish by exporting to PDF for clean, layout-stable sharing.
Excel VLOOKUP Basics — Pull Values from Another Table
Stop cross-referencing two spreadsheets by hand. VLOOKUP lets you fetch prices, contacts, or any value automatically using a single lookup key. Covers syntax, step-by-step example, #N/A fixes, and when to use XLOOKUP instead.
How to Export Excel Spreadsheets to PDF Without Tables Getting Cut Off
When you save an Excel file as a PDF, tables often split across multiple pages. Learn how to fix this with print area, Fit to Page, landscape orientation, and page break preview — step by step.
How to Find and Remove Duplicate Data in Excel — Complete Office Guide
Remove duplicate rows in Excel in seconds, or highlight them with color without deleting. Covers COUNTIF, UNIQUE, and Google Sheets. Free, no install needed.
How to Freeze Rows and Columns in Excel — Keep Headers Visible While Scrolling
Step-by-step guide to freezing the top row, left column, or both in Excel so headers stay visible as you scroll. Includes the cell-selection rule, difference from Print Titles, Google Sheets equivalent, and how to unfreeze.
How to Add a Line Break Inside an Excel Cell — Alt+Enter, Wrap Text & CHAR(10)
Pressing Enter in an Excel cell just moves you to the next row. Here's how to add a line break inside a single cell using Alt+Enter, Wrap Text, and the CHAR(10) formula — plus Google Sheets tips.
Discount Calculator — Find Sale Price, Discount Rate & Original Price
Learn the discount formulas and avoid the stacked-discount trap. Calculate sale price, discount percentage, and reverse-calculate the original price — free, no sign-up.
Date Calculator Guide — D-day Countdown, Days Between Dates & Date ±N Days
Count down to any D-day, find the number of days between two dates, or calculate a date N days in the future or past. Free, no install or sign-up needed.
Shrink Text-Heavy PDFs — A 13MB Property Register Down to 1MB (Image-Conversion Compression)
Standard compression barely shrinks text-only PDFs like property registers, terms, and contracts. The 'image-conversion' method rasterizes each page and rebuilds a PDF, cutting size by 90%+. Free, no install or sign-up.
BMI Calculator — Check Your Body Mass Index (Korean Standard)
Learn the BMI formula, Korean obesity classification by the Korean Society for the Study of Obesity, and the limits of BMI. Calculate yours free — no sign-up needed.
Korean Apartment Floor Areas — 전용 (Exclusive) vs 공급 (Supply) vs Contract Area
Why does the same "34평" feel different in size? A clear guide to Korean apartment area types — exclusive (전용), common (공용), supply (공급), and contract area — plus the 전용률 efficiency ratio and ㎡↔평 conversion.
How to Write Amounts in Korean for Contracts — "일금 …원정" Converter (Free)
Convert a numeric amount into the Korean contract notation "일금 …원정". Just type the number and copy the result. Learn why it prevents tampering, with examples. Free, no install or sign-up.
How to Make Wi-Fi & Business Card QR Codes — Free QR for Cafes and Stores
Let guests connect to Wi-Fi without a password and let people scan a business card to instantly save your contact. How to create Wi-Fi and vCard QR codes for free.
What Is UTM? How to Build Campaign Tracking URLs — Analyze Marketing Performance in GA4
To analyze traffic from ads and social media, UTM parameters are essential. Learn the rules for utm_source, medium, and campaign, and how to build tracking URLs for free.
How to Type Special Characters — ※ ★ → ℃ ① and Emoji Collection & Copy (Free)
How to type and copy special characters and emoji not on your keyboard with a single click. Arrows, math symbols, units, circled numbers, and emoji all in one place.
Severance Pay Calculator — How to Calculate Your Severance Pay from Average Wage
Wondering how much severance pay you'll receive when you leave a job? How to calculate it accurately and for free using your length of service and 3-month average wage.
How to Scan a Document with Your Phone — Make a PDF for Free, No Watermark
Turn a photo of a paper document into a clean, straightened PDF. Edge correction and shadow removal like a scanner app, but with no logo or watermark, free.
Net Salary Calculator (Korea) — Take-Home Pay After Insurance and Tax (2026)
After the four major insurances and income tax come out of your annual salary, what is your actual monthly take-home pay? Learn how to calculate it accurately and for free, including dependents.
Convert a Lunar Birthday to the Solar Calendar — Calculate 60th, 70th, and 80th Birthday Dates
Not sure what solar date your parent's lunar birthday falls on each year? Convert a lunar birthday to the solar calendar and calculate milestone celebration dates (60th, 70th, 80th) for free.
Loan Interest Calculator — How to Calculate Monthly Repayments (Equal Principal+Interest vs. Equal Principal)
Wondering how much you'll pay each month and what the total interest will be before taking out a loan? Here's how to calculate monthly repayments and total interest for both equal installment and equal principal repayment methods. Free.
How to Fix Garbled Text — Repair Broken UTF-8 / CP949 Korean Encoding
Opened a text, CSV, or subtitle file and the Korean shows up as ¿½ or □? Here's how to fix encoding problems (UTF-8 vs EUC-KR/CP949) for free.
Age Calculator — How to Calculate Your Exact Age (Korean & International Age)
Enter your date of birth to instantly get your international age, year age, traditional Korean age, and zodiac sign. A free, accurate way to work out exactly how old you are.
How to Calculate VAT — Separating Net Amount and VAT (10%) from a Total (Free Calculator)
How to separate 10% VAT and the net amount from a total, and how to add VAT to a net amount, with formulas and examples. A free VAT calculator that gives instant results from just the amount.
How to Send Large Files — With One-Time Download Links (No Sign-Up for Recipients)
How to send big files that exceed email attachment limits using one-time links. Upload a file, get a download link, and it auto-deletes after a set time for safety. Recipients don't even need to sign up.
How to Redact Personal Information from a PDF — Truly Remove IDs and Account Numbers (Beware the Black-Box Trap)
Safely hide sensitive data like ID numbers, account numbers, and amounts in contract and official PDFs. Instead of just laying a black box on top, the text data itself is deleted, so it cannot be revealed by copying or searching.
How to Move a PDF Table into Excel — Extract to Editable XLSX with Live Cells (Free)
Extract tables from a PDF into a real Excel file (XLSX) with live cells, without retyping anything. Calculate, sort, and edit right away, and multiple tables split into separate sheets. Free, no install or sign-up.
How to Create a QR Code Free — URL or Text to PNG, No Expiry
Turn any URL or text into a QR code image instantly. Live preview as you type, download as PNG, and use it on posters, business cards, or menus forever. Free, no install, no sign-up.
How to Make an ID Photo at Home — Passport, Visa & Standard Sizes, Free
Make a properly sized ID or passport photo at home — no studio needed. Crop to exact passport, visa, or standard dimensions and get a print-ready 4×6 sheet, all in one step. Free, no install, no sign-up.
How to Convert HEIC to JPG — Open iPhone Photos on Windows and Upload Forms (Free)
When iPhone photos in HEIC format won't open on Windows, Android, or file upload fields, here's the fastest way to convert them to JPG. Batch convert multiple photos at once, or bundle them into a single PDF. Free, no installation required.
How to Count Characters — Count Words, Characters & Bytes (With/Without Spaces)
How to check character limits for essays, assignments, and social posts. A free character counter that tallies characters with and without spaces, plus words, lines, and bytes in real time.
How to Reduce Image File Size — Compress Photos for Free
How to shrink photo and image file sizes. Adjust quality and dimensions to compress to JPG, and solve upload limits and email attachment problems. Multiple images at once, free, with no install or sign-up.
What Is an HWPX File? Differences from HWP and How to Open It
What an HWPX file is, how it differs from the older HWP, and how to open it without Hancom Office. Plus the advantages of this open XML standard document format and when to use which.
Is the Contract You Received Genuine? How to Verify PDF Tampering (SHA-256 Fingerprint Check)
How to confirm a signed PDF contract hasn't been forged or altered. Upload the completed PDF you hold and its SHA-256 fingerprint is recalculated and matched against the genuine original. With an audit trail, even a third party can verify it.
How to Split a PDF — Extract Specific Pages or Break It into Several Files (Free)
How to pull only the pages you want from a PDF into a single file, or split a large PDF into several files. Range selection and single-page splitting, free in your browser with no install.
How to Add a Watermark to a PDF — "Confidential" or Page Numbers on Every Page at Once (Free)
Add a watermark like "Confidential" or page numbers to every page of a PDF at once. Choose position, opacity, and color, free with no install. Handle confidential labels and page-number requirements instantly.
How to Convert a PDF to Word (DOCX) — Make It Editable (Free)
Convert a PDF to an editable Word file (DOCX) while preserving its text and tables. Free, with no install or sign-up — including notes on scanned files and tips for a clean conversion.
How to Password-Protect and Unlock a PDF (Free, No Install, AES-256)
Set an open password on a sensitive PDF, or remove the lock with a password you know. Free, with no install or sign-up — and your uploaded files and the password you enter are never stored.
Best Free PDF Compressor Sites — How to Reduce File Size (Quality-Safe, Secure)
When a PDF is too big to email or upload, learn how to pick a free PDF compressor (security, quality, strength control) and our pick. Choose a strength and shrink it with no install or sign-up — and use a site that deletes uploaded files after processing.
How to Reorder, Rotate, and Delete PDF Pages (Free, No Install)
View PDF pages as thumbnails, drag to reorder, rotate pages that scanned in upside down or sideways, and delete blank pages — all free, with no install or sign-up.
How to Open Hancom Hangul (HWP / HWPX) Files Online — No Software Required, Works on iPhone
A guide to opening HWP and HWPX files in your browser without installing Hancom Office. View documents instantly on iPhone, Android, or any desktop — no sign-up needed. Includes instructions for saving as PDF.
Merge PDF Files — Combine Multiple PDFs into One (Free, Reorder Pages)
A straightforward guide to merging multiple PDF files into one. Drag to reorder pages, combine files in any order, and download — all free, no installation required.
How to Create a Stamp (Dojang) Image Online — Personal & Corporate Seals, Free Transparent PNG
Generate a Korean seal (dojang) image online in seconds — personal name stamp, round inkan, square seal, or corporate seal. Transparent PNG background drops cleanly onto any document. Free, no install, no sign-up.
How to Convert Photos to PDF — Combine Multiple Images into One PDF File (Free)
Learn how to combine phone photos of documents — such as business registration certificates, bank statements, and ID cards — into a single PDF. Drag to reorder pages, merge multiple images into one file, free with no installation or sign-up.
Free PDF Tools — Merge, Split, Compress, and Convert in One Place (No Installation)
A complete collection of free PDF tools with no installation or sign-up required. Merge, split, compress, organize pages, add watermarks, fill and sign, convert images and Hangul (HWP) files to PDF, and more — all in one place.
How to Create and Get an E-Contract Signed for Free (2026)
A step-by-step guide to building an electronic contract and getting it signed at no cost. The other party signs with mobile or email verification and no sign-up, and sequential/parallel signing plus audit trail and verification are all included free.
How to Fill and Sign a PDF — No Printing or Scanning (Free, No Install)
How to type your name and date into a received application or consent PDF, add a handwritten signature or stamp, and submit it right away. No printing, scanning, install, or sign-up — completely free.
Are E-Signatures Legally Valid? Korea's E-Signature Law Made Simple (2026)
Does a signature made through an emailed link hold up legally? Based on Korea's Electronic Signature Act and Electronic Documents Act, here's a plain-language guide to when an e-signature carries the same effect as a handwritten one, why the audit trail matters, and which documents need more than an e-signature.
E-Signature Service Comparison 2026 — DocuSign vs Modusign vs FreeSign
An honest comparison of the three leading e-signature services — DocuSign, Modusign, and FreeSign — across price, recipient sign-up, Hancom Hangul (HWP) support, and audit trail / verification, with recommendations by situation.
How to Convert Word (DOC/DOCX) to PDF — Free, No Install
How to convert Word (DOC/DOCX) documents to PDF for free. Do it right in your browser with no software to install, plus tips to keep formatting and fonts from breaking.
Is DocuSign Free? A Truly Free E-Signature Alternative (Send & Sign at No Cost)
With DocuSign, signing a document you receive is free, but sending (requesting a signature) requires a paid subscription. Here's a 100% free alternative for Korea — FreeSign — that even handles Hancom Hangul (HWP) contracts, with a step-by-step guide and comparison table.
How to Convert Hancom Hangul (HWP/HWPX) Files to PDF for Free — No Hancom Office Required
A complete guide to converting HWP and HWPX files to PDF for free, without installing Hancom Office. Works directly in your browser and on mobile — includes tips to prevent font rendering issues.