Client-side utility directory
Free browser tools for text, code, and documents.
Format, convert, clean, and inspect data on your device. Every tool runs in local browser memory without uploading text to remote servers.
Popular Utilities
Tools for character counting, case conversions, and note taking.
Word Counter
Count words, characters, sentences, paragraphs, and reading time.
Character Counter
Count characters, letters, digits, whitespace, and byte size.
Case Converter
Convert text to uppercase, lowercase, title case, camelCase, snake_case, and kebab-case.
Online Notepad
Text editor with local browser auto-saving.
JSON Formatter & Validator
Format, minify, and validate JSON data.
Base64 Encoder / Decoder
Encode and decode Base64 strings and UTF-8 text.
Compress Image
Reduce PNG, JPG, and WebP image file sizes.
Resize Image
Resize image dimensions by pixels or percentage.
Image to Base64
Convert image files into Base64 Data URI strings.
SVG to PNG Converter
Convert vector SVG files into high-resolution PNG or JPG images.
Percentage Calculator
Calculate percentage increases, decreases, fractions, and differences.
Discount & Sales Tax Calculator
Calculate final checkout prices, discounts, coupon stacks, and sales tax.
Loan & Mortgage Calculator
Calculate monthly payments, total interest, and annual amortization schedule.
Compound Interest Calculator
Calculate investment growth with monthly contributions and annual returns.
Age & Milestone Calculator
Calculate exact age in years, months, days, and next birthday countdown.
Universal Unit Converter
Convert length, mass, temperature, digital data, time, and speed units.
CSS Unit Converter
Convert px to rem, em, vw, vh, and percentage units.
Color Code Converter
Convert HEX, RGB, HSL, and CMYK color codes.
JSON to CSV / CSV to JSON
Convert JSON array data to CSV tables and CSV to JSON.
Merge PDF
Combine multiple PDF files into one document.
Split PDF
Extract specific page ranges or single pages from a PDF.
Image to PDF Converter
Convert PNG, JPG, and WebP images into a multi-page PDF.
Rotate PDF
Rotate all or selective PDF pages by 90°, 180°, or 270°.
Organize & Delete PDF Pages
Visual page grid to reorder, shift, or delete pages.
Tool Categories
Browse utilities organized by data format and task type.
A comprehensive suite of client-side text utilities including word counter, case converter, line sorter, duplicate remover, and notepad.
Client-side developer utilities designed for privacy and speed. No sensitive tokens or code snippets ever touch a server.
Reliable PDF processing tools built with strict privacy guarantees and automatic temporary file cleanup.
High-speed image manipulation with support for WebP, PNG, JPG, and AVIF formats.
Instant, deterministic unit conversions computed client-side with zero latency.
Accurate, verified calculators for percentages, tips, age calculation, date ranges, and loan estimates.
Client-Side Privacy
Swizztool processes text data on your local computer. Review the three technical privacy specifications:
In-browser computation
All text transformations, counters, and sorting algorithms run directly inside your local JavaScript thread without network requests.
Zero server storage
Drafts, code snippets, tokens, and documents never leave your computer. No logs or database records are ever created.
Local browser persistence
Utilities like the Online Notepad store data strictly in HTML5 localStorage on your physical device.