# ReallyUseful.Tools > Free online tools for PDFs, images, CSV/Excel, calculators, text, converters, and timers. Many tools process files in your browser so nothing is uploaded to a server. For AI agents: start here for curated links to authoritative pages. Fetch `/llms-full.txt` when you need per-tool how-to steps, tags, and FAQs. Key facts: - 101 free tools; no account or subscription required. - In-browser tools keep files and inputs on your device; see Privacy for details. - Canonical site URL: http://reallyuseful.tools - Full catalog: http://reallyuseful.tools/llms-full.txt ## Pages - [Home](http://reallyuseful.tools/): Browse free online tools by category. - [All tools](http://reallyuseful.tools/tools): Full directory of implemented tools. - [About](http://reallyuseful.tools/about): What ReallyUseful.Tools is and how the tools work. - [Privacy](http://reallyuseful.tools/privacy): Privacy policy for browser-based tools. ## Categories - [PDF Tools](http://reallyuseful.tools/pdf-tools): Merge, split, rotate, compress, convert, and edit PDF files with browser-based tools that keep document processing on your device. - [Image Tools](http://reallyuseful.tools/image-tools): Resize, crop, compress, edit, and convert images locally in your browser, with support for common formats including JPG, PNG, WebP, and HEIC. - [Excel/CSV](http://reallyuseful.tools/excel-csv): Convert, view, edit, merge, split, and analyze CSV and Excel files entirely in your browser — nothing is uploaded to a server. - [Calculators](http://reallyuseful.tools/calculators): Use practical calculators for finance, health, dates, grades, percentages, tax, measurements, and everyday planning. - [Text & Writing](http://reallyuseful.tools/text-and-writing): Count words and characters, change text case, generate placeholder copy, take notes, and perform other writing tasks in your browser. - [Unit Converter](http://reallyuseful.tools/unit-converter): Convert common measurements and values including length, weight, temperature, speed, volume, numbers, and time zones. - [Timers](http://reallyuseful.tools/timers): Run an online timer, stopwatch, or Pomodoro session directly in your browser for work, study, exercise, and everyday tasks. ## Featured tools - [Word to PDF](http://reallyuseful.tools/tools/word-to-pdf): Convert Word documents to PDF online for free. Upload a DOCX and download a clean PDF in seconds. - [Merge PDF](http://reallyuseful.tools/tools/merge-pdf): Combine multiple PDF files into one document online. Private, fast, and easy to use in your browser. - [Compress PDF](http://reallyuseful.tools/tools/compress-pdf): Compress PDF files online and reduce file size quickly. A simple privacy-friendly PDF compressor. - [PDF to JPG](http://reallyuseful.tools/tools/pdf-to-jpg): Convert PDF pages to JPG images online. Choose pages, render quickly, and download images from your browser. - [JPG to PDF](http://reallyuseful.tools/tools/jpg-to-pdf): Turn JPG images into a PDF online. Reorder images, choose page size, and export a clean PDF. - [Split PDF](http://reallyuseful.tools/tools/split-pdf): Split PDF files online. Extract pages, separate ranges, and download new PDFs privately in your browser. - [Image compressor](http://reallyuseful.tools/tools/image-compressor): Compress images online and reduce file size while controlling quality. Works in your browser. - [Image resizer](http://reallyuseful.tools/tools/image-resizer): Resize images online by pixels, percentage, or aspect ratio. Private, fast, and free in your browser. - [PNG to JPG](http://reallyuseful.tools/tools/png-to-jpg): Convert PNG images to JPG online for free. Upload, choose quality, and download a JPEG instantly. - [HEIC to JPG](http://reallyuseful.tools/tools/heic-to-jpg): Convert HEIC iPhone photos to JPG online. Fast browser-based conversion with no account needed. - [JPG to PNG](http://reallyuseful.tools/tools/jpg-to-png): Convert JPG images to PNG online for free. Upload a JPEG and download a PNG instantly. - [WebP to PNG](http://reallyuseful.tools/tools/webp-to-png): Convert WebP images to PNG online. Upload a WebP file and download a PNG from your browser. ## Tags - [Calculator tools](http://reallyuseful.tools/tags/calculator): Online calculators for dates, finance, health, grades, tax, percentages, and common everyday calculations. - [CSV tools](http://reallyuseful.tools/tags/csv): Browser tools for converting, viewing, editing, validating, and transforming CSV files without uploading them. - [Document tools](http://reallyuseful.tools/tags/document): Tools for combining, splitting, converting, editing, and preparing PDF and Word documents. - [Excel tools](http://reallyuseful.tools/tags/excel): Browser tools for converting, viewing, editing, and transforming Excel spreadsheets (.xlsx and .xls) locally. - [File Converter tools](http://reallyuseful.tools/tags/file-converter): Convert PDFs, documents, images, CSV, and Excel files between commonly used formats in your browser. - [Finance tools](http://reallyuseful.tools/tags/finance): Estimate loan payments, mortgage costs, interest growth, take-home pay, tax, discounts, and other financial figures. - [Generator tools](http://reallyuseful.tools/tags/generator): Generate ready-to-use placeholder content directly in your browser. - [Health tools](http://reallyuseful.tools/tags/health): Estimate BMI, calorie needs, and pregnancy dates with browser-based health calculators. - [Image tools](http://reallyuseful.tools/tags/image): Convert, resize, crop, compress, edit, or package image files using browser-based tools. - [In Browser tools](http://reallyuseful.tools/tags/in-browser): Tools that perform their calculations or file processing directly in your web browser. - [Local First tools](http://reallyuseful.tools/tags/local-first): Utilities designed to keep saved content and processing on your own device. - [PDF tools](http://reallyuseful.tools/tags/pdf): Tools for merging, splitting, rotating, compressing, converting, unlocking, and editing PDF files. - [Photo tools](http://reallyuseful.tools/tags/photo): Crop, resize, compress, convert, and make basic adjustments to photos in your browser. - [Privacy Friendly tools](http://reallyuseful.tools/tags/privacy-friendly): File and content tools that process data locally instead of uploading it to an application server. - [Student tools](http://reallyuseful.tools/tags/student): Calculators and writing tools for grades, GPA, study sessions, assignments, and academic work. - [Text tools](http://reallyuseful.tools/tags/text): Count, convert, generate, and format text for writing, editing, and development tasks. - [Timer tools](http://reallyuseful.tools/tags/timer): Date, time, countdown, stopwatch, and focus-session tools for schedules and everyday time tracking. - [Writing tools](http://reallyuseful.tools/tags/writing): Writing utilities for counting, formatting, drafting, and organizing text. ## Optional - [Full catalog](http://reallyuseful.tools/llms-full.txt): Every tool with description, category, tags, how-to notes, and FAQs. - [Sitemap](http://reallyuseful.tools/sitemap.xml): Machine-readable list of indexable URLs.