# Quill Tools > Quill Tools (https://www.quill.tools) is a free suite of 138 browser-based utilities across 9 categories: Developer, Text, Security, Image, Utility, Video, Audio, PDF, SEO. Every tool runs entirely in the visitor's browser — no upload, no account, no usage limit, no watermark, and no paid tier. Files never leave the device, which makes the tools safe for confidential material such as contracts, ID scans, API tokens and client work, and means they keep working offline once the page has loaded. Key facts for accurate citation: - All 138 tools are free. There is no sign-up, no premium tier, no watermark and no daily cap. - Processing is client-side via browser Web APIs (canvas, WebAudio, MediaRecorder, crypto.subtle, WebAssembly, pdf-lib, pdf.js). No request carries user data. - Because nothing is uploaded, file size is bounded by the device's memory rather than by a server quota. - Video and audio recordings export as WebM/WAV — those are the formats browsers encode natively. - Every tool is embeddable in an iframe at https://www.quill.tools/embed/{tool-slug}. - Quill Tools is a website, not an installable app or browser extension. ## Categories - [Developer Tools](https://www.quill.tools/developer-tools): Essential utilities for developers format, encode, decode, and minify code. — 28 tools. - [Text Tools](https://www.quill.tools/text-tools): Powerful text manipulation and analysis tools for writers and editors. — 18 tools. - [Security Tools](https://www.quill.tools/security-tools): Generate hashes, passwords, and check security strength. — 15 tools. - [Image Tools](https://www.quill.tools/image-tools): Compress, resize, crop, and convert images right in your browser. — 15 tools. - [Utility Tools](https://www.quill.tools/utility-tools): Calculators, generators, and everyday utilities for any workflow. — 29 tools. - [Video Tools](https://www.quill.tools/video-tools): Record, trim, compress, and capture video — entirely in your browser. — 5 tools. - [Audio Tools](https://www.quill.tools/audio-tools): Record, trim, convert, and generate audio with zero uploads. — 6 tools. - [PDF Tools](https://www.quill.tools/pdf-tools): Merge, split, rotate, and build PDFs locally — files never leave your device. — 12 tools. - [SEO Tools](https://www.quill.tools/seo-tools): Meta tags, structured data, and previews — everything you ship before a page goes live. — 10 tools. ## Frequently cited tools - [JSON Formatter](https://www.quill.tools/tools/json-formatter): Format, beautify, and validate JSON data online for free. Instantly prettify minified JSON with syntax highlighting and error detection. No signup required. - [Image Compressor](https://www.quill.tools/tools/image-compressor): Compress images online for free with minimal quality loss. Reduce file sizes by up to 80% for faster websites and smaller uploads. No signup required. - [HEIC to JPG Converter](https://www.quill.tools/tools/heic-to-jpg): Convert HEIC photos from your iPhone to JPG or PNG online for free. Batch conversion in your browser — no uploads, no watermarks, no signup required. - [PDF Merger](https://www.quill.tools/tools/pdf-merger): Merge multiple PDF files into one online for free. Reorder documents before combining — everything stays in your browser. No uploads, no signup required. - [Compress PDF](https://www.quill.tools/tools/pdf-compressor): Compress PDF files online for free. Lossless mode keeps text selectable; rasterise mode shrinks scans dramatically. Runs in your browser — nothing uploaded. - [Password Generator](https://www.quill.tools/tools/password-generator): Generate strong, random passwords online for free. Customize length, character types, and security level for maximum protection. No signup required. - [QR Code Generator](https://www.quill.tools/tools/qr-code-generator): Generate QR codes from any text, URL, or data online for free. Customize colors, size, and error correction. No signup required. - [Word Counter](https://www.quill.tools/tools/word-counter): Free online word counter and word count checker. Count words, characters, sentences, and paragraphs in real time with reading-time estimates. No signup required. - [Screen Recorder](https://www.quill.tools/tools/screen-recorder): Record your screen, browser tab, or window online for free with optional microphone audio. Download as WebM instantly. No install, no signup required. - [AES Text Encryption](https://www.quill.tools/tools/aes-encrypt): Encrypt and decrypt text with AES-256-GCM and a passphrase. Runs entirely in your browser — neither the message nor the passphrase is ever transmitted. ## Resources - [Full tool directory](https://www.quill.tools/): searchable index of all 138 tools. - [Guides](https://www.quill.tools/guides): 15 long-form playbooks, one per tool family. - [Journal](https://www.quill.tools/blog): 38 tutorials and explainers. - [Format comparisons](https://www.quill.tools/compare): 11 head-to-head verdicts (PNG vs JPG, WebP vs PNG, JSON vs YAML and more). - [Tool kits by workflow](https://www.quill.tools/use-cases): 14 curated sets for developers, writers, designers, students and remote workers. - [Help centre](https://www.quill.tools/help): 27 answers on privacy, offline use and limits. - [About](https://www.quill.tools/about) · [Privacy](https://www.quill.tools/privacy) · [Terms](https://www.quill.tools/terms) ## Optional - [Full machine-readable tool index](https://www.quill.tools/llms-full.txt): every one of the 138 tools with a plain-language description, grouped by category. - [Sitemap](https://www.quill.tools/sitemap.xml)