https://apprun.icu/ 2026-10-11 daily 1.0 https://apprun.icu/assets/og/home.png?v=7apprun.icu — one domain, many worlds: a hub of free web apps, tools, games and experiments https://apprun.icu/about/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/about.pngAbout apprun.icu & Our Editorial Approach — apprun.icu https://apprun.icu/accessibility/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/accessibility.pngAccessibility & Motion Preferences — apprun.icu https://apprun.icu/aquarium-planner/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/aquarium-planner.png?v=7Aquarium Planner — a tank elevation with fish silhouettes, stocking bar and water parameter strips, on apprun.icu https://apprun.icu/aspect-ratio-calculator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/aspect-ratio-calculator.pngAspect Ratio Calculator — Resize Without Stretching — apprun.icu https://apprun.icu/astro-calculator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/astro-calculator.png?v=7Astro Calculator — a sensor frame with a deep-sky target to scale and sampling verdict, on apprun.icu https://apprun.icu/base64-encoder-decoder/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/base64-encoder-decoder.pngBase64 Encoder & Decoder — Unicode Text & Base64url — apprun.icu https://apprun.icu/bookbingo/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/bookbingo.png?v=7BookBingo — reading challenge bingo cards, on apprun.icu https://apprun.icu/bookmatch/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/bookmatch.png?v=7BookMatch — mood-based book recommendations, on apprun.icu https://apprun.icu/bravestnewworld/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/bravestnewworld.png?v=7Bravest New World — quiet browser tools for writing, math, focus, links, colors and JSON, on apprun.icu https://apprun.icu/bravestnewworld/tools/jsonview/ 2026-10-11 weekly 0.6 https://apprun.icu/assets/og/jsonview.png?v=7JSONView — format, inspect and search JSON without uploading it, on apprun.icu https://apprun.icu/bravestnewworld/tools/linkvault/ 2026-10-11 weekly 0.6 https://apprun.icu/assets/og/linkvault.png?v=7Bravest New World — quiet browser tools, on apprun.icu https://apprun.icu/bravestnewworld/tools/palette/ 2026-10-11 weekly 0.6 https://apprun.icu/assets/og/palette.png?v=7Palette — WCAG-checked colour sets with harmony modes, on apprun.icu https://apprun.icu/bravestnewworld/tools/quickcalc/ 2026-10-11 weekly 0.6 https://apprun.icu/assets/og/quickcalc.png?v=7Bravest New World — quiet browser tools, on apprun.icu https://apprun.icu/bravestnewworld/tools/timebox/ 2026-10-11 weekly 0.6 https://apprun.icu/assets/og/timebox.png?v=7TimeBox — a Pomodoro focus timer with cycles, streaks and a session log, on apprun.icu https://apprun.icu/bravestnewworld/tools/zenfocus/ 2026-10-11 weekly 0.6 https://apprun.icu/assets/og/zenfocus.png?v=7ZenFocus — distraction-free writing with drafts and word goals, on apprun.icu https://apprun.icu/color-contrast-checker/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/color-contrast-checker.pngColor Contrast Checker — WCAG AA & AAA Ratios — apprun.icu https://apprun.icu/csv-json-converter/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/csv-json-converter.pngCSV to JSON & JSON to CSV Converter — Private & Free — apprun.icu https://apprun.icu/cut-optimizer/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/cut-optimizer.png?v=7Cut Optimizer — sheet layouts with labelled pieces, utilisation bar and cost on apprun.icu https://apprun.icu/drone-mission-calculator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/drone-mission-calculator.png?v=7Drone Mission Calculator — a lawnmower flight plan over a survey rectangle with GSD and overlap readouts, on apprun.icu https://apprun.icu/equations/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/equations.png?v=7Math equations explained simply, on apprun.icu https://apprun.icu/file-hash/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/file-hash.pngSHA-256 File Hash Checker — SHA-384 & SHA-512, Locally — apprun.icu https://apprun.icu/glossary/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/glossary.pngBrowser Tools Glossary — Plain-Language Definitions — apprun.icu https://apprun.icu/guides/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/guides.png?v=1Guides on apprun.icu: practical answers with a working tool inside, on a voxel guides island https://apprun.icu/guides/accessible-color-contrast/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-accessible-color-contrast.png?v=1Check accessible color contrast for real text and backgrounds — a worked guide on apprun.icu https://apprun.icu/guides/aspect-ratios-without-stretching/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-aspect-ratios-without-stretching.png?v=1Resize an image without stretching: aspect ratios explained — a worked guide on apprun.icu https://apprun.icu/guides/audiobook-hours-to-pages/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-audiobook-hours-to-pages.png?v=1How many pages is an audiobook — a converter between audiobook hours and printed pages, drawn on a voxel bookshelf island https://apprun.icu/guides/camper-van-inverter-size/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-camper-van-inverter-size.png?v=1What size inverter does a camper van need — an inverter sizer, a what-runs table and cable sizes, on a voxel off-grid van island https://apprun.icu/guides/check-file-integrity-sha256/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-check-file-integrity-sha256.png?v=1Check a file’s SHA-256 checksum without uploading it — a worked guide on apprun.icu https://apprun.icu/guides/count-words-and-reading-time/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-count-words-and-reading-time.png?v=1How to count words and estimate reading time — a worked guide on apprun.icu https://apprun.icu/guides/csv-to-json-without-losing-data/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-csv-to-json-without-losing-data.png?v=1Convert CSV to JSON without losing IDs, quotes or rows — a worked guide on apprun.icu https://apprun.icu/guides/generate-strong-passwords/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-generate-strong-passwords.png?v=1Generate strong passwords without sending them to a server — a worked guide on apprun.icu https://apprun.icu/guides/how-many-books-can-you-read-in-a-year/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-how-many-books-can-you-read-in-a-year.png?v=1How many books can you read in a year — a minutes-a-day calculator with the formula worked through on a voxel reading gauge https://apprun.icu/guides/markdown-preview-safely/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-markdown-preview-safely.png?v=1Preview Markdown safely and export a clean draft — a worked guide on apprun.icu https://apprun.icu/guides/pedalboard-power-supply-ma/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-pedalboard-power-supply-ma.png?v=1How many mA does a pedalboard need — a power-supply sizer, a daisy-chain versus isolated diagram and typical pedal current draw, on a voxel pedalboard island https://apprun.icu/guides/percentage-change-vs-difference/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-percentage-change-vs-difference.png?v=1Percentage change vs difference vs percentage points — a worked guide on apprun.icu https://apprun.icu/guides/pixels-dpi-print-size/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-pixels-dpi-print-size.png?v=1Pixels, PPI and print size: calculate before printing — a worked guide on apprun.icu https://apprun.icu/guides/unix-timestamps-seconds-milliseconds/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-unix-timestamps-seconds-milliseconds.png?v=1Unix timestamps: seconds, milliseconds and timezone mistakes — a worked guide on apprun.icu https://apprun.icu/guides/ups-size-for-nas-home-server/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-ups-size-for-nas-home-server.png?v=1What size UPS do you need for a NAS or home server — VA versus watts, a runtime chart and a UPS sizer, on a voxel server rack island https://apprun.icu/guides/url-encoding-vs-base64/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-url-encoding-vs-base64.png?v=1URL encoding vs Base64: choose the right representation — a worked guide on apprun.icu https://apprun.icu/guides/uuid-v4-explained/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/guide-uuid-v4-explained.png?v=1UUID v4 explained: random IDs, collisions and permissions — a worked guide on apprun.icu https://apprun.icu/headless-ai-coding-agent-usage/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/headless.png?v=7Headless Agents — a practical guide to agentic automation, on apprun.icu https://apprun.icu/image-print-size/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/image-print-size.pngImage Print Size Calculator — Pixels, Inches, cm & PPI — apprun.icu https://apprun.icu/install/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/install.pngInstall apprun.icu — Offline Tools & Notifications — apprun.icu https://apprun.icu/markdown-preview/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/markdown-preview.pngMarkdown Preview — Private Editor & Safe HTML Export — apprun.icu https://apprun.icu/mindgrowth/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/mindgrowth.png?v=7MindGrowth — self-help & personal development books, ranked live on apprun.icu https://apprun.icu/neurovoid/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/neurovoid.png?v=7NEUROVOID — neural space shooter, on apprun.icu https://apprun.icu/newmind/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/newmind.png?v=7NewsMind — news analysis and correlation engine, on apprun.icu https://apprun.icu/nextread/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/nextread.png?v=7nextread — on apprun.icu https://apprun.icu/password-generator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/password-generator.pngStrong Password Generator — Local, Cryptographic Randomness — apprun.icu https://apprun.icu/pattern-scaler/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/pattern-scaler.png?v=7Pattern Scaler — original vs target body silhouettes and per-measurement scale bars, on apprun.icu https://apprun.icu/pedalboard-planner/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/pedalboard-planner.png?v=7Pedalboard Planner — a top-down pedalboard with signal chain and power table, on apprun.icu https://apprun.icu/percentage-calculator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/percentage-calculator.pngPercentage Calculator — Percent Of, Change & Difference — apprun.icu https://apprun.icu/privacy/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/privacy.pngPrivacy & Local Data on apprun.icu — apprun.icu https://apprun.icu/quotewell/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/quotewell.png?v=7QuoteWell — timeless literary quotes, on apprun.icu https://apprun.icu/rack-planner/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/rack-planner.png?v=7Rack Planner — a rack elevation with device blocks, total power and heat figures, on apprun.icu https://apprun.icu/readpace/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/readpace.png?v=7ReadPace — a reading-speed test with a timed passage, a words-per-minute result and a finish-date reading plan https://apprun.icu/saas-benchmarks/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/saas-benchmarks.png?v=1SaaS Benchmarks — growth, retention, margin and valuation bars for private B2B software companies on apprun.icu https://apprun.icu/scifiorbit/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/scifiorbit.png?v=7SciFiOrbit — live-ranked science fiction & fantasy books on apprun.icu https://apprun.icu/seating-planner/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/seating-planner.png?v=7Seating Planner — a table plan with round and rectangular tables, seat assignments and conflict highlights, on apprun.icu https://apprun.icu/serieslog/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/serieslog.png?v=7SeriesLog — book series tracker, on apprun.icu https://apprun.icu/techreads/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/techreads.png?v=7TechReads — AI, programming & technology books, ranked live on apprun.icu https://apprun.icu/text-case-converter/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/text-case-converter.pngText Case Converter — Upper, Lower, Title & Sentence Case — apprun.icu https://apprun.icu/thrillseek-webapp-thriller-book-engine/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/thrillseek.png?v=7ThrillSeeker — thriller, mystery & suspense books, ranked live on apprun.icu https://apprun.icu/timestamp-converter/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/timestamp-converter.pngUnix Timestamp Converter — Seconds, Milliseconds & UTC — apprun.icu https://apprun.icu/tools/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/tools.pngFree Browser Tools — Writing, Data, Design & Calculators — apprun.icu https://apprun.icu/topics/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/topics.pngExplore Tools & Guides by Topic — apprun.icu https://apprun.icu/topics/creative-planning/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-creative-planning.pngCreative projects, layouts & practical planners — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/data-conversion/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-data-conversion.pngData conversion & developer tools — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/design/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-design.pngDesign, image sizing & accessible color — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/home-lab/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-home-lab.pngHome lab, network & server planning — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/off-grid/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-off-grid.pngCamper van & off-grid power planning — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/privacy-security/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-privacy-security.pngPrivacy & everyday security tools — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/reading/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-reading.pngReading goals, book discovery & tracking — Tools & Practical Guides — apprun.icu https://apprun.icu/topics/writing/ 2026-10-11 monthly 0.7 https://apprun.icu/assets/og/topics-writing.pngWriting & editing tools — Tools & Practical Guides — apprun.icu https://apprun.icu/url-encoder-decoder/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/url-encoder-decoder.pngURL Encoder & Decoder — UTF-8 Components, Locally — apprun.icu https://apprun.icu/uuid-generator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/uuid-generator.pngUUID v4 Generator — Secure Random IDs in Your Browser — apprun.icu https://apprun.icu/van-power-calculator/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/van-power-calculator.png?v=7Van Power Calculator — a camper power diagram with battery, solar, inverter blocks and a daily-energy stacked bar, on apprun.icu https://apprun.icu/vitalreads/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/vitalreads.png?v=7VitalReads — health, nutrition & wellness books, ranked live on apprun.icu https://apprun.icu/wealthreads/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/wealthreads.png?v=7WealthReads — finance, investing & business books, ranked live on apprun.icu https://apprun.icu/wifi-planner/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/wifi-planner.png?v=7Wi-Fi Planner — a floor plan with coverage rings and a coverage score, on apprun.icu https://apprun.icu/word-counter/ 2026-10-11 weekly 0.8 https://apprun.icu/assets/og/word-counter.pngWord Counter — Characters, Sentences & Reading Time — apprun.icu