Browse by Category
Privacy & Security Tools
Inspect and remove hidden metadata from PDFs and images
PDF Tools
Merge, split, compress and organize PDFs
Image Tools
Convert, compress, resize and clean images
Text Tools
Count, clean and transform text
Developer Tools
JSON, URL, timestamp, encryption and hashes
Calculators & Converters
Percentage, timestamp, unit converter and more
Popular Tools
Reduce PDF file size with multiple compression modes
Combine multiple PDF files into one document
Split PDF into multiple files by pages or ranges
Batch compress JPG, PNG, WebP images
Batch convert JPG, PNG, WebP image formats
Convert HEIC photos to JPG or PNG in your browser, no uploads
Privacy & Security Tools
Document Privacy Checker
Inspect and remove hidden metadata and privacy risks from PDFs and images directly in your browser.
Office Privacy Checker & Cleaner
Inspect and remove metadata, author info, comments, notes and hidden data from DOCX, XLSX and PPTX files locally in your browser.
PDF Sensitive Info Redactor
Permanently black out and remove sensitive text, personal data and confidential information from PDF files
Redact Screenshot
Hide faces, emails, phone numbers, IP addresses, QR codes, API keys and other sensitive information from screenshots directly in your browser.
PDF Tools
Merge PDF
Combine multiple PDF files into one document
Images to PDF
Convert JPG, PNG, WebP images to PDF
PDF to Image
Convert PDF pages to JPG, PNG or WebP images
Compress PDF
Reduce PDF file size with multiple compression modes
PDF to Word
Convert PDF files into editable Word documents
PDF to Excel
Convert PDF tables into editable Excel spreadsheets
Redact PDF
Permanently remove sensitive text and information from PDF files
Remove PDF Metadata
View and remove hidden metadata from PDF files privately in your browser
Extract Images from PDF
Extract embedded images from PDF files and download them individually or as ZIP
Extract Text from PDF
Extract text from PDF files. View by page, search, copy and download as TXT, Markdown or JSON. 100% browser-based.
Crop PDF & Remove White Margins
Auto-detect white margins or manually crop PDF pages. Apply to all or selected pages.
Rotate PDF Pages
Rotate PDF pages left, right or 180°. Batch rotate selected or all pages. 100% browser-based.
Split PDF
Split PDF into multiple files by pages or ranges
Organize PDF Pages
Reorder, delete, rotate and extract PDF pages visually
Add Watermark to PDF
Add text or logo watermarks to PDF with custom position and opacity
Add Page Numbers to PDF
Add page numbers, headers and footers with customizable format and position
Fill and Sign PDF
Add text, dates, signatures and symbols to PDF documents in your browser
Protect PDF with Password
Encrypt PDF files with AES-256 password protection directly in your browser
Unlock PDF
Remove a known PDF password locally
Annotate PDF
Add highlights, drawings, text, shapes and notes to PDF in your browser
Image Tools
Image Format Converter
Batch convert JPG, PNG, WebP image formats
Image Compressor
Batch compress JPG, PNG, WebP images
Image Resizer
Batch resize images by pixel or percentage
Batch Image Watermark
Add text and logo watermarks to images in batch
Batch Image Rotator
Rotate and flip images in batch with custom angles
HEIC to JPG/PNG
Convert HEIC photos to JPG or PNG in your browser, no uploads
EXIF Viewer & Remover
View hidden photo metadata and remove GPS, device and privacy data locally
Image Ratio Calculator
Calculate and scale image aspect ratios
Image Crop
Crop images with precise pixel coordinates, fixed aspect ratios, circular crop and batch processing.
ID Photo Maker
Crop and prepare ID photos with size guides, basic checks and printable layouts.
Portrait Background Remover
Remove portrait backgrounds with AI, replace with transparent, solid colors or custom images locally.
Social Media Image Resizer
Resize and crop images for Instagram, TikTok, YouTube, Facebook, LinkedIn, X and Pinterest. Preview safe areas and export multiple sizes locally in your browser.
Text Tools
Word & Character Count
Count characters, words, lines and more
Case Converter
Convert text between different case formats
Remove Duplicate Lines
Remove duplicate lines from text
Space Cleaner
Clean up extra spaces, tabs and blank lines
Reading Time Calculator
Estimate reading time for text
Text Diff Checker
Compare two texts and highlight additions, deletions and changes by character, word or line. Import files and export diff reports locally in your browser.
Sensitive Data Detector & Masker
Detect and mask emails, phone numbers, IDs, card numbers, IP addresses, API keys, JWTs, private keys and sensitive URL parameters locally in your browser.
Markdown Editor & Preview
Write and preview Markdown with tables, task lists, syntax highlighting, word count, local drafts, HTML export and print-to-PDF. Your content stays in your browser.
Developer Tools
JSON Formatter
Format and compress JSON data
URL Encoder & Decoder
Encode and decode URLs, query parameters and form data
Timestamp Converter
Convert between Unix timestamps and dates
AES Encryption
Encrypt and decrypt text with AES-256-GCM
MD5 Hash Calculator
Calculate text and file MD5, support local file verification
UTM Link Generator
Generate marketing links with UTM parameters
QR Code Generator
Generate QR codes with logo, colors and batch support
Barcode Generator
Generate Code 128, EAN, UPC barcodes with batch support
Calculators & Converters
Percentage Calculator
Calculate various percentage scenarios
Unit Converter
Convert length, weight, temperature, area, volume, speed, data storage and more.
Age Calculator
Calculate your exact age, next birthday and total days lived.
Date Difference Calculator
Calculate the difference between two dates in years, months, days, weeks and working days.
Date Add & Subtract Calculator
Add or subtract days, weeks, months and years from any date. Handle leap years and month-end dates automatically.
Business Days Calculator
Count business days between dates or add/subtract working days. Customize weekends, holidays and special workdays.
Margin & Markup Calculator
Calculate profit margin, markup, selling price, discounts and break-even price.
Loan & Amortization Calculator
Calculate loan payments, total interest and a complete amortization schedule, including extra payments.
Why Choose Qudo
Privacy First
Tools that support local processing run directly on your device. Your files are not sent to Qudo servers.
Fast & Simple
No software installation or account creation. Open a tool and get started immediately.
Complete Workflow
Organize, split, and merge PDFs, or resize, convert, and compress images in one convenient workflow.