HEIC Converter
Convert HEIC and HEIF photos to JPG or PNG in your browser. Batch conversion, adjustable JPEG quality, no upload and clear format limitations.
Open tool16 practical web apps
Free tools. Built with AI. Ready to use.
Convert files, inspect websites, plan projects, calculate rules and solve everyday tasks directly in your browser.
Tool catalog
Choose a tool and get the job done
Each app is available without an account or subscription. Language support is shown inside every tool.
Sailor License
Free practice with 153 English COLREG/IALA questions, topic review, local progress and a dedicated mistake-review queue.
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Starlink Power Calculator
Estimate Starlink daily Wh, battery Ah, solar watts, runtime and energy balance using current official model ranges and editable off-grid assumptions.
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NMEA 2000 Network Builder
Plan an NMEA 2000 backbone, place the power tee, enter device LEN and cable lengths, and check topology, current and voltage drop locally in your browser.
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Sailing Passage Planner
Estimate great-circle sailing distance, passage time, fuel and a configurable reserve. Add waypoints, calculate apparent wind and export JSON or GPX.
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Free OCR Reader
Extract text from HEIC, PNG, JPEG and WebP images locally in your browser. Choose OCR language, preprocessing and page layout, then copy or download the result.
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Website Audit Tool
Audit one web page with Google Lighthouse data and transparent HTML checks for SEO, accessibility, metadata, headings, images, labels and source quality.
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LLM Token Counter
Count o200k_base and cl100k_base tokens locally, compare transparent estimates, calculate API input and output cost, and check context-window use.
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CutList AI Optimizer
Free guillotine cut list optimizer for MDF, chipboard, plywood and furniture panels. Minimize sheets and waste with kerf, grain, custom sheet sizes and printable layouts.
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Schengen 90/180 Calculator
Count Schengen short-stay days with the rolling 90/180 rule. Check past stays, plan a future entry, test a requested stay and keep trip dates private in your browser.
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AI Text Detector
Inspect AI-like writing patterns locally in your browser. See the measurements and score weights, compare samples, and export a transparent heuristic report.
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EU AI Act Transparency Checker
Map potential EU AI Act Article 50 duties by provider or deployer role. Check notices, machine-readable marking, deepfakes, public-interest text and accessibility.
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EXIF Metadata Remover
Remove EXIF, GPS, XMP and other readable photo metadata locally in your browser. Clean JPEG, PNG, WebP and HEIC copies, then verify the result.
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Favicon Generator
Turn one PNG, JPEG, WebP or SVG logo into a validated favicon package with multi-size ICO, Apple touch icon, web app icons, manifest and HTML tags.
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QR Code Generator
Create verified static QR codes for URLs, text, email, phone, SMS, Wi-Fi and vCard. Export crisp PNG or SVG locally with no redirect or account.
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Duplicate Photo Finder
Find exact duplicate photos with SHA-256 and visually similar images with dHash. Scan folders locally, compare safely and export a review list.
Open toolUseful first. Free by default.
Xephory publishes focused applications with clear inputs, practical outputs and straightforward limitations.
No subscription
The tools are available without trials, upgrade walls or recurring fees.
Privacy-aware
Browser-based processing is used whenever the task allows it. Each tool explains when an external service is needed.
Actively maintained
Tools are tested, corrected and updated as browsers, formats and requirements change.