Classic Converter
Classic Converter guides
Get better results from your files
Pick the right conversion, understand where processing happens, and check the output before you share it.
Turn a PDF into editable Word text
Choose text extraction or OCR, understand what the Word export preserves, and check the result before using it.
Read guide → Office → PDFPrepare an Office document for PDF export
Convert Word, Excel, and PowerPoint files, avoid layout surprises, and understand server processing and file limits.
Read guide → Compress PDFMake a PDF smaller without losing what matters
Compare preservation and image-based compression, choose settings for scans, and understand what can be lost.
Read guide →Browse all tools and instructions
Tool collections and file utilities
- Unit Converter
Convert length, mass, volume, and temperature units.
- Currency Converter
Convert amounts using dated reference exchange rates.
- Time Converter
Convert durations and compare time zones.
- Image Converter
Compress images and change output formats quickly.
- Video Inspector
View video metadata and conversion guidance.
- Audio Inspector
Inspect audio formats and file details.
- PDF Tools
Merge, convert, secure, and export PDFs — mostly in your browser.
- Document Converter
Convert documents across common formats.
- Health Calculators
Compute BMI, BMR, age, and wellness metrics.
- Text Utilities
Count, transform, format, and generate text in your browser.
- API / Data Tools
Beautify and validate JSON/XML, format SQL, parse cron, and convert Unix timestamps.
- Productivity Utilities
QR scanner, barcodes, EMI, calendars, and quick links to converters.
- Security Utilities
Passwords, encryption, hashes, and SSL certificate checks.
- Device Testing
Test microphone, webcam, speakers, keyboard, mouse, and touch in your browser.
- Invoice Maker
Create and export professional invoices with multi-currency support.
PDF Tools
- Merge PDFs
Combine up to 2 PDFs in your browser.
- Split PDF
Build one new PDF from chosen pages.
- Rotate PDF
Turn PDF pages 90° or 180°.
- Compress PDF
Shrink PDF file size; preserve layout or rasterize scans.
- Add headers & watermarks
Overlay headers, footers, page numbers, and watermarks.
- PDF to Word
Convert PDF to Word (DOCX); best for text PDFs.
- PDF to Excel
Convert PDF to Excel (XLSX).
- PDF to PPT
Convert PDF pages to PowerPoint slides.
- Word to PDF
Convert Word documents to PDF.
- Excel to PDF
Convert spreadsheets to PDF.
- PPT to PDF
Convert slide decks to PDF.
- PDF to Image Converter
Convert PDF pages to JPG or PNG images in your browser.
- PDF to Text
Extract text from PDF; OCR for scans.
- PDF to HTML
Convert PDF to a simple HTML document.
- HTML to PDF
Create PDF from HTML content.
- Protect & encrypt PDF
Password-protect and encrypt with AES.
- PDF permissions
Restrict printing, copying, and editing.
- Remove PDF security
Decrypt and remove PDF restrictions.
- PDF signatures & certificates
Sign, verify, and manage digital certificates.
Health Calculators
- BMI Calculator
Body mass index from height and weight.
- Body Fat Calculator
Estimate body fat percentage.
- Ideal Weight Calculator
Healthy weight range for your height.
- BMR Calculator
Basal metabolic rate calories at rest.
- TDEE Calculator
Total daily energy expenditure with activity.
- Water Intake Calculator
Daily water intake recommendation.
- Age Calculator
Calculate age from birth date.
Text Utilities
- Word Counter
Count words, characters, lines, and more as you type.
- Character Counter
Count characters with and without spaces.
- Case Converter
Convert text to upper, lower, title, camelCase, and more.
- Remove Duplicate Lines
Keep the first occurrence of each line.
- Sort Text
Sort lines alphabetically or by length.
- Find & Replace
Find and replace text with optional regex.
- Text Diff Checker
Compare two texts and highlight differences.
- Lorem Ipsum Generator
Generate placeholder paragraphs, sentences, or words.
- Random Text Generator
Generate random strings from a custom character set.
- Regex Tester
Test regular expressions and view matches.
- Markdown Preview
Live preview of Markdown rendered to HTML.
- HTML Formatter
Beautify or minify HTML markup.
- YAML Formatter
Beautify and validate YAML documents.
API / Data Tools
- JSON Beautifier
Prettify JSON with readable indentation.
- JSON Validator
Check whether text is valid JSON.
- XML Validator
Check whether markup is well-formed XML.
- SQL Formatter
Format SQL queries for readability.
- Cron Parser
Describe a cron expression and see upcoming run times.
- Unix Timestamp Converter
Convert between Unix epoch and date/time.
Productivity Utilities
- QR Code Scanner
Scan QR codes with your device camera.
- Barcode Generator
Create barcodes from text in common formats.
- EMI Calculator
Estimate monthly loan payments and total interest.
- Calendar Generator
Build a printable month calendar.
Security Utilities
- Password Generator
Create strong random passwords with custom rules.
- Password Strength Checker
Score a password and get improvement tips.
- File Encryption
Encrypt or decrypt files with AES in your browser.
- Text Encryption / Decryption
Encrypt or decrypt text with a password.
- SHA / MD5 Generator
Compute MD5, SHA-1, SHA-256, SHA-384, or SHA-512 hashes.
- SSL Checker
Inspect TLS certificate details for a hostname.
Device Testing
- Microphone Test
Check mic input levels and confirm your browser can access the microphone.
- Webcam Test
Preview your camera feed and verify video permissions in the browser.
- Speaker Test
Play a test tone to confirm audio output and system volume.
- Keyboard Test
See key, code, and modifier state for each key press in real time.
- Mouse Test
Track pointer position, clicks, and scroll wheel inside a test area.
- Touchscreen Test
Visualize touch points and gestures on touch-capable screens.
- Device Info
View screen, browser, platform, and hardware details reported by your device.
- Browser Compatibility
See which web APIs and features your browser supports.
About Classic Converter
Learn about the project and how the tools work.
Classic Converter brings file conversion, PDF tools, invoice creation, and everyday utilities into one website. Many tools process data in your browser. Operations that need the conversion service send the required files to our hosted backend.
These guides describe the tools as they work today, including the tradeoffs. Keep your original files, review generated results, and check your organization’s rules before uploading sensitive information.
For corrections, questions, or a conversion that did not work as expected, contact Classic Converter. Please describe the issue without sending confidential documents or certificate passwords.