Online Converter and Image Compression β PDF, Calculators
Compress JPG/PNG online, convert HEIC to JPG, merge PDF, percentage and discount calculators. Fast browser-based processing without upload.
Image Processing Tools
View all tools βCompress Images Online
Powerful image optimization tool with adjustable quality settings. Perfect for preparing photos for web publishing, reducing file sizes for faster site loading, or saving disk space. Processing happens locally in your browser β your files never leave your device.
- β Support for all popular formats (JPG, PNG, WebP, GIF, SVG)
- β Up to 90% size reduction while maintaining quality
- β Batch processing of up to 50 files simultaneously
- β Adjustable quality level from 1% to 100%
Resize Images
Professional image scaling tool with aspect ratio locking or custom sizing. Supports precise pixel dimensions, percentage scaling, or standard resolution presets (HD, Full HD, 4K). Use for preparing images for social media, printing, or web publications.
- β Precise pixel dimensions or percentage scaling
- β Maintain aspect ratio or free scaling
- β Resolution presets (Instagram, Facebook, Twitter, etc.)
- β Support for JPG, PNG, WebP, AVIF, HEIC formats
Convert Images
Universal converter for transforming images between any formats. Especially useful for converting iPhone HEIC photos to JPG, creating modern WebP images for websites, or converting transparent PNGs to JPG with white background. Supports batch processing and output quality adjustment.
- β Convert between 10+ image formats
- β HEIC to JPG for iPhone photos
- β PNG to JPG with background color selection
- β Create modern WebP and AVIF formats
Crop Images
Intuitive cropping tool with aspect ratio presets for social media and printing. Select crop area manually or use popular formats: square 1:1 for Instagram, 16:9 for video, 4:3 for photos. Supports precise coordinate and dimension input in pixels.
- β Aspect ratio presets (1:1, 16:9, 4:3, 3:2)
- β Free crop of any area
- β Precise coordinate and dimension input
- β Real-time result preview
Round Image Corners
Simple tool for creating images with rounded corners of any radius. Perfect for avatars, profile icons, product cards in online stores, or design elements with soft edges. PNG format preserves transparency, JPG fills corners with selected background color.
- β Adjust rounding radius from 1 to 100%
- β Create perfectly circular avatars
- β Preserve transparency in PNG
- β Select background color for JPG
PDF Tools
View all tools βConvert to PDF
Powerful tool for creating PDF documents from images of any format. Upload multiple images, reorder them by drag-and-drop, set page size (A4, Letter, A3) and create PDF in seconds. Processing happens entirely in browser β your files aren't uploaded to server.
- β Support for JPG, PNG, WebP, HEIC and other formats
- β Reorder images by drag-and-drop
- β Select page size (A4, Letter, A3, Custom)
- β Adjust quality and orientation
Merge PDF Files
Powerful tool for merging multiple PDF files into a single document. Upload PDF files, reorder them by drag-and-drop, and combine into one. Processing happens entirely in browser using modern PDF.js technology β your documents stay on your device and aren't uploaded to server.
- β Merge unlimited number of PDFs
- β Reorder pages by drag-and-drop
- β Preview each PDF before merging
- β 100% secure β browser-based processing
Split PDF Document
Convenient tool for extracting individual pages or ranges from PDF documents. Preview all pages, select needed ones, and create new PDF with selected pages. Perfect for extracting chapters from large documents, removing unnecessary pages, or creating presentations from reports.
- β Preview all PDF pages
- β Select individual pages or ranges
- β Extract each page to separate PDF
- β Fast processing of large documents
Text Tools and Utilities
View all tools βNumber to Words
Automatic conversion of numbers to their textual representation for documents, contracts, checks and financial reports. Supports integers, decimals, currencies (rubles, dollars, euros) with correct noun declension. Necessary for filling accounting documents, invoices and contracts.
- β Convert integers and decimals
- β Support for currencies (rubles, dollars, euros)
- β Correct declension (ruble, rubles)
- β Russian and English languages
QR Code Generator
Fast and simple QR code generator for any text, URLs, emails or phone numbers. Customize size, color and error correction level. Download QR code in PNG or SVG formats for printing or digital materials. Perfect for business cards, advertising, restaurant menus and events.
- β QR codes from text, URL, email, phone
- β Customize size and resolution
- β Choose colors (background and foreground)
- β Export to PNG, SVG, PDF
Text Case Converter
Universal tool for changing letter case in text. Convert text to uppercase (UPPERCASE), lowercase (lowercase), title case of each word (Title Case), sentence case (Sentence case) or random case. Useful for formatting titles, fixing text typed with Caps Lock on.
- β 6 case conversion modes
- β UPPERCASE conversion
- β lowercase conversion
- β Title Case, Sentence case
2FA Token Generator
One-time password (TOTP) generator for two-factor authentication, compatible with Google Authenticator, Authy and other apps. Enter secret key from QR code or text string β get 6-digit codes updating every 30 seconds. Useful for account login when smartphone isn't available.
- β Compatible with Google Authenticator, Authy
- β Generate 6-digit TOTP codes
- β Auto-refresh every 30 seconds
- β Import from QR code or secret key
JSON Formatter
Professional JSON editor for web developers. Automatic JSON formatting (prettify) with indentation, syntax validation with error highlighting, minification for size reduction, tree view of data structure. Supports JSON files up to 10 MB. Useful for API work, configuration files and debugging.
- β Automatic formatting with indentation
- β Syntax validation and error highlighting
- β JSON minification (remove whitespace)
- β Tree view of structure
Text Transliteration
Accurate transliteration of Cyrillic text to Latin according to GOST, ICAO standards for international documents and passports. Supports Russian, Ukrainian and Belarusian languages. Use for filling forms, booking tickets, visa documents or creating URL-friendly slugs for websites.
- β GOST standard for official documents
- β ICAO standard for passports
- β Support for Russian, Ukrainian, Belarusian
- β URL-friendly transliteration for websites
Markdown Viewer
Online Markdown document editor and viewer with extended GitHub Flavored Markdown (GFM) syntax support. Supports tables, checkboxes, code blocks with syntax highlighting, emojis and math formulas. Use for previewing README files, writing documentation or creating notes.
- β GitHub Flavored Markdown (GFM)
- β Tables, checkboxes, code blocks
- β Syntax highlighting in 180+ languages
- β Export to HTML and PDF
Unity Log Cleaner
Specialized tool for Unity developers to clean console logs from excessive stacktraces, timestamps and service information. Extracts only important Debug.Log, Warning and Error messages, preserving structure and context. Perfect for bug analysis, debugging and preparing logs for team.
- β Remove stacktraces and service data
- β Filter by type (Log, Warning, Error)
- β Preserve message context
- β Export cleaned logs to TXT
Time Zone Converter
Convenient tool for converting time between time zones of 400+ cities worldwide. Automatic daylight saving time (DST) accounting, visual time comparison in multiple cities simultaneously, planning international meetings and conferences. Shows time difference, UTC offset and current time in selected locations.
- β 400+ cities and time zones
- β Automatic daylight saving time (DST) accounting
- β Compare time in 10+ cities simultaneously
- β International meeting planner
Calculators and Financial Tools
View all tools βPercentage Calculator Online
Universal percentage calculator for solving any percentage tasks: find percentage of number, calculate percentage difference between two values, add or subtract percentage. Ideal for calculating discounts, markups, price changes, financial analysis and everyday math tasks.
- β Percentage of number (what is X% of Y)
- β Percentage difference between numbers
- β Add and subtract percentages
- β Calculate discounts and markups
Discount Calculator
Simple calculator for finding product price after discount application. Enter original price and discount percentage β get final price and savings amount. Useful for shoppers when choosing products on sales, and for sellers when planning promotions.
- β Calculate final discounted price
- β Calculate savings amount
- β Reverse calculate discount percentage
- β Multiple discount calculator
Compound Interest Calculator
Professional financial calculator for calculating deposit and investment returns accounting for compound interest (capitalization). Enter initial amount, interest rate, term and compounding frequency β get detailed calculation of final amount, accrued interest and capital growth charts.
- β Calculate with different compounding frequencies
- β Capital growth chart over time
- β Account for inflation and taxes
- β Calculate effective interest rate
Why Choose Convertilo
Completely free
No hidden fees. Compress unlimited number of images.
Data security
Processing happens in browser. Your files never leave your device.
Quality preservation
Smart compression algorithms with minimal visual quality loss.
Instant processing
Compression happens instantly without server upload wait.
How to compress images
Select file
Upload image from computer or drag to upload area
Configure compression
Choose quality level and additional optimization parameters
Download result
Get compressed file with reduced size in seconds
Frequently Asked Questions
What file formats are supported?
We support all popular formats: images (JPG/JPEG, PNG, WebP, GIF, SVG, AVIF, HEIC), documents (PDF, DOCX, XLSX, PPTX), text formats (JSON, Markdown, Plain text). Each format is processed considering its specifics to achieve best results.
Is it safe to upload files to the site?
Yes, absolutely safe. All processing happens locally in your browser without data transmission to our servers. Your files never leave your device and are automatically deleted from browser memory after closing the page. We use modern JavaScript technologies for client-side file processing.
How much can I reduce file size?
Compression level depends on file type and format: JPG images β up to 90%, PNG β up to 70%, WebP β up to 50%, GIF β up to 70%, SVG β up to 70%, PDF documents β up to 60%. Image quality or document readability remains acceptable for most tasks.
Can I process multiple files simultaneously?
Yes, most of our tools support batch file processing. You can upload up to 50 images, 20 PDF documents, or 100 text files at once. This allows efficient work with multiple files, saving time and effort.
What is the maximum file size for processing?
Maximum size depends on file type and tool: images β up to 50 MB, PDF documents β up to 100 MB, text files β up to 10 MB. For larger files, we recommend first reducing their resolution, splitting into several parts, or using specialized software.