Docs

Web & SEO

Guide to every Web & SEO tool: robots.txt, sitemaps, redirects, schema, headers and on-page checks.

All guides

  • Getting started: What OpenFile is, how to use your first tool, install it as an app and work offline.
  • How OpenFile works: The zero-upload privacy architecture, the processing engines and first-use model downloads.
  • Keyboard shortcuts: Global, command palette, docs and Sketch board keyboard shortcuts.
  • PDF tools: Guide to every PDF tool: merge, split, compress, sign, protect, OCR and more.
  • Convert: Guide to converting between PDF, Word, Excel, PowerPoint, Markdown, HTML and images.
  • Image tools: Guide to compressing, resizing, converting, background removal, upscaling and editing images.
  • Video tools: Guide to trimming, compressing, converting, GIFs and recording video in the browser.
  • Audio tools: Guide to editing, converting, recording and transcribing audio on-device.
  • Developer tools: Guide to JSON, JWT, hashes, regex, QR codes, cURL conversion and other developer utilities.
  • Text & data tools: Guide to diffing, counting, case conversion, Markdown and text cleanup tools.
  • Design tools: Guide to colors, gradients, CSS, favicons, SVG and the Sketch whiteboard.
  • Workspace pipelines: Chain steps into reusable recipes and batch-process hundreds of images or PDFs.
  • Sketch board: The infinite whiteboard: tools, boards, sharing, presenting, exporting and shortcuts.
  • Favorites, history & settings: How favorites, recent tools, activity history and settings are stored locally in IndexedDB.
  • Self-hosting: Deploy OpenFile to Vercel, GitHub Pages, any static host or Docker with nginx.
  • API reference: The optional Vercel serverless routes: /api/health, /api/fetch-page and /api/meta.
  • Browser support: Which browsers and platform features each group of tools needs.
  • FAQ: Answers to common questions about privacy, limits, offline use and troubleshooting.
  • Contributing & adding a tool: Set up the project, follow the tool conventions and add a new tool to the registry.
  • Changelog: Release notes for every OpenFile version.
  • Install on every device: Install OpenFile as a web app, a desktop app for Windows, macOS and Linux, an Android APK or on iPhone.
  • Using tools: Drop zones, batches, page ranges, presets, history, undo and where your downloads go.
  • Themes and accessibility: Black, dark, light and system themes, accent colors, fonts, density, reduced motion and keyboard use.
  • Offline and PWA: How the service worker caches the app, engines and models, how updates work and how to clear data.
  • Open with and share target: Open files from your system with OpenFile and send files to it from the share sheet.
  • Local AI: Which AI models run on your device, their sizes, first-run downloads, WebGPU or CPU, cancelling and privacy.
  • Privacy and security: No uploads, how to verify it yourself in the DevTools network tab, headers and what is stored locally.
  • Formats supported: A searchable matrix of every input and output format, generated from the tool registry.
  • Full tools reference: Every tool with its description, formats and link, generated from the registry. Filter and search.
  • Troubleshooting: Large files, memory, browser support, Safari quirks, unsigned app warnings and quick fixes.
  • Developer guide: Architecture, adding a tool, batch files, tests, builds, Pages and Vercel base paths and releasing the apps.
  • Roadmap: What has shipped and what comes next, generated from the project roadmap.
  • Data: Guide to every Data tool: csv, excel, json, sqlite, parquet, maps and gps.
  • AI: Guide to every AI tool: on-device ai for images, text and documents.
  • 3D: Guide to every 3D tool: view and convert glb, gltf, obj, stl, ply and more.
  • Archives: Guide to every Archives tool: open and create zip, 7z, tar, gz and rar.
  • eBooks: Guide to every eBooks tool: read and convert epub, mobi, fb2 and comics.
  • Fonts: Guide to every Fonts tool: convert, inspect and subset ttf, otf, woff.
  • CAD: Guide to every CAD tool: view and convert dxf and other drawings.
  • Subtitles: Guide to every Subtitles tool: convert, sync and edit srt, vtt, ass.
  • Security & Privacy: Guide to every Security & Privacy tool: scrub metadata, lock files, hide messages, redact personal data.
  • Maps & GPS: Guide to every Maps & GPS tool: gpx elevation, splits, heatmaps, privacy zones and location codes.
  • Office & Sheets: Guide to every Office & Sheets tool: merge, split, compare and pivot spreadsheets, clean word files.
  • Science & Education: Guide to every Science & Education tool: equations, graphs, chemistry, matrices, logic and primes.
  • Creator Studio: Guide to every Creator Studio tool: audiograms, vertical video, carousels, word clouds and chapters.
  • Study & Classroom: Guide to every Study & Classroom tool: flashcards, quizzes, worksheets, puzzles, citations and grades.
  • Web & SEO: Guide to every Web & SEO tool: robots.txt, sitemaps, redirects, schema, headers and on-page checks.
  • Calendar & Time: Guide to every Calendar & Time tool: calendar files, repeat rules, rotas, timesheets and printable planners.
  • Money & Finance: Guide to every Money & Finance tool: bank statements, receipts, loans, tax and shared expenses.
  • Health & Fitness: Guide to every Health & Fitness tool: fit workouts, heart rate zones, apple health data, pace and body measures.

Tools

  • robots.txt Generator & Tester: Build a robots.txt with rule groups and sitemaps, block AI crawlers in one tick, and test which URLs are allowed.
  • XML Sitemap Generator: Make sitemap.xml from a list of URLs or your HTML files, with dates and priorities, split at 50,000 URLs.
  • Sitemap Checker: Check a sitemap for broken dates, wrong priorities, duplicates and mixed hosts, and find pages missing from it.
  • Redirect Rules Generator: Turn a list of old and new URLs into redirect rules for Apache, Nginx, Netlify, Vercel, Cloudflare, IIS or Caddy.
  • Hreflang Tag Generator: Make hreflang tags for language and country versions of a page as HTML, sitemap entries or an HTTP header.
  • Security Headers Generator: Build a Content Security Policy, HSTS and other security headers, graded, for Nginx, Apache, Netlify, Vercel and more.
  • UTM Link Builder: Build campaign links with UTM tags one at a time or in bulk, make a QR code, or read the tags in a link.
  • Schema Markup Generator: Make JSON-LD structured data for FAQ, Article, Product, Local Business, Event, Recipe, How-to and more.
  • llms.txt Generator: Write an llms.txt file that gives AI assistants a clean map of your site, docs and key pages.
  • On-page SEO Checker: Check page HTML for title, description, headings, alt text, canonical, Open Graph, structured data and keyword use.
  • AI Meta Description Writer: Write meta descriptions from your page text with on-device AI, fitted to 155 characters with a search preview.
  • Link Extractor: Pull every link from HTML with its anchor text, split internal and external, and spot nofollow and empty links.
  • security.txt Generator: Make a security.txt file (RFC 9116) so researchers know how to report problems with your site.

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