Free In-Browser Converters & Calculators
Convert images, compress files to target sizes, and run calculators directly inside your device memory. Your sensitive files are never uploaded to any remote server.
Image Converters & Compression
Universal formats, target-size optimization, and batch processing.
HEIC to JPG
Convert Apple HEIC photos to universal JPG format directly in your browser. Fast, 100% private, batch conversion without server uploads.
HEIC to PNG
Convert iPhone HEIC photos to lossless PNG format with transparency retention. Runs entirely in your browser without file uploads.
HEIC to PDF
Combine and convert HEIC camera photos into standard PDF documents in your browser. 100% private, zero file uploads.
WebP to JPG
Convert modern WebP images to standard JPG format in seconds. Free browser-based conversion with zero server uploads.
WebP to PNG
Convert WebP images to uncompressed PNG while retaining full alpha transparency. Runs client-side for absolute privacy.
PNG to WebP
Convert PNG images to modern WebP format for faster web page load speeds. Client-side, free, and batch-enabled.
JPG to WebP
Convert JPG photos to lightweight WebP files. Cut file sizes while maintaining sharp visual quality directly on your device.
AVIF to JPG
Convert next-gen AVIF images to universally supported JPG format. Quick, private, client-side browser conversion.
AVIF to PNG
Convert AVIF pictures to crisp PNG images with transparent backgrounds. Completely offline and private in your browser.
Calculators & Text Tools
Instant calculations and text transformers that run offline.
Percentage Calculator
Calculate percentage increases, decreases, fractions, and percentage of values with step-by-step formula explanations.
calculatorAge Calculator
Calculate your exact age in years, months, weeks, days, and hours from your birthdate. Fast, responsive, and private.
calculatorDate Difference Calculator
Calculate total days, weekdays, and elapsed time between two calendar dates. Works offline in your browser.
calculatorDiscount Calculator
Find the final sale price and total savings from percentage or fixed discounts and sales tax. Quick retail calculator.
calculatorTip Calculator
Calculate restaurant tips and split total bills easily among dining guests with custom tip percentages.
textWord Counter
Real-time word, character, sentence, and paragraph counter with estimated reading time. 100% private in-browser analysis.
textCase Converter
Convert text instantly to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case in your browser.
textJSON Formatter & Validator
Format, prettify, minify, and validate JSON data with clear syntax error highlights. Runs locally without sending data to servers.
Image Format Guides & Specs
Honest compression benchmarks, browser support tables, and format trade-offs.
Why Client-Side Privacy Matters
Most free online file converters transmit your private files to cloud servers where they are queued, processed, and stored on remote hard drives. This introduces serious privacy risks for business receipts, ID documents, medical paperwork, and family photos.
Best Converter never uploads your files. All file parsing, Canvas decoding, and compression runs exclusively on your CPU using HTML5 standards. You can verify this in real time by opening your browser Developer Tools (F12) and checking the Network tab: zero file payload requests are ever transmitted.