Patch Notes & Release History

ZeroTools is constantly updated to optimize processing, introduce new client-side utilities, and provide an ultra-secure local experience.

v1.7.02026-08-20

Slide Puzzle Custom Board Solver, Enhanced HEIC Converter & Multilingual Optimization

FeatureAdded custom board creation and text paste modes to Slide Puzzle (15 Puzzle). Users can now input custom number arrangements or paste puzzle states to automatically solve them with real-time A* algorithm animations and mathematical parity checks for solvability.
Bug FixImproved the iPhone Photo (HEIC/HEIF) Converter to fix decoding errors on Windows and specific browsers. A 3-tier fallback decoder now ensures reliable high-quality conversion to JPEG/PNG.
UpdateOptimized language detection and routing logic between Japanese and English versions for smoother, error-free language switching.
Bug FixFixed layout rendering bugs on Safari browsers where puzzle grid cells in Slide Puzzle and Reversi were cut off or displaced on specific screen dimensions.
UpdateUpdated and expanded technical explainers, security FAQs, and step-by-step usage manuals across all 200+ utilities to clearly outline local browser privacy guarantees.

v1.6.12026-07-11

FeatureAdded Octave (-2 to +2) and Transpose (-12 to +12 semitones) controls to the Piano Synthesizer tool, dynamically updating key labels as pitches shift.
Bug FixFixed a z-index overlap bug where header language dropdown menus slipped behind sticky search bars on page scroll.
Bug FixResolved a markdown parsing issue in technical blog articles where horizontal divider lines (---) were incorrectly rendered as bullet points.
Bug FixFixed layout clipping issues on PDF, image conversion, and audio tools to ensure drag-and-drop file upload zones work smoothly across all screen sizes.

v1.6.02026-07-07

FeatureCompleted English translation support for all technical blog posts. This resolves language switcher bugs and allows global readers to browse all tech articles seamlessly.
FeatureAdded match setup configurations to Reversi AI, allowing players to choose to play as Black (First) or White (Second). Choosing White automatically triggers the computer's opening move.
Bug FixFixed a layout bug where the bottom row of cells on the Reversi board was cut off on certain screen sizes.
PerformanceUpgraded the AI move assistant helper to look multiple moves ahead, taking opponent responses into account. The heatmap now warns players about placing pieces in spots where the AI could easily capture corners.
FeatureAdded detailed strategic guides to the Reversi rules panel. Explained that the heatmap percentages represent a relative evaluation of how good a move is rather than an absolute win rate, and shared tips for beating the Hard AI.

v1.5.12026-07-06

FeatureCompleted English translations across the portal. Interactive tool options, output messages, and detailed usage manuals and FAQs can now be viewed in English.
FeatureReorganized the English routing structure to fix page layout bugs and access errors during navigation.
FeatureAdded a language selector toggle (JA/EN) to the global header, enabling seamless switching between languages.

v1.5.02026-07-01

FeatureLaunched the 'GIF Grid Compiler' tool, enabling users to place multiple videos, GIFs, and images into a grid layout and compile them into a single video or GIF.
FeatureAdded barcode camera scanning and ISBN search to the 'Digital Bookshelf' tool to automatically fill in book details like title, author, and cover art.
FeatureAdded specialized landing pages for different birth years and income levels on the Resume Calculator and Furusato Tax Simulator to display tailored career and tax advice.

v1.4.02026-06-30

FeatureIntroduced the offline-first 'Digital Bookshelf' tool, allowing users to save book metadata and cover images securely in their browser (IndexedDB) and organize collections in an interactive shelf layout.
FeaturePublished a blog post sharing tips on how to prevent buying duplicate books and the security benefits of using serverless local databases.

v1.3.12026-06-30

FeaturePublished an explainer guide on how to read raw mail headers, trace Received paths, and understand security protocols like SPF, DKIM, and DMARC.

v1.3.02026-06-29

Bug FixFixed an issue in Magic Eraser where brush stroke lines occasionally remained on the saved image or repeated erasures caused pixelated noise.
FeatureUpgraded the underlying object removal algorithm to use texture synthesis (patch matching) to deliver clean, natural-looking results on detailed backdrops like grass or brick walls.

v1.2.02026-06-28

FeatureAdded detailed usage instructions and security FAQs to the bottom of all tool pages to explain how inputs are kept safe locally.
PerformanceImproved initial page load speeds by lazy-loading heavier components and preventing script conflicts.
PerformanceFixed script rendering errors on specific mobile web browsers to improve page transition stability.
AccessibilityAdded ARIA descriptive labels for screen readers to improve accessibility, and adjusted text contrast ratios to make reading easier.

v1.1.02026-06-27

FeatureAdded lightweight share buttons for X (Twitter) and Hatena Bookmark to let users quickly share tools without using tracking scripts.
FeatureCreated dedicated index pages for categories like Developer, Media, and Security to make finding specific tools easier.

v1.0.02026-06-25

FeatureLaunched ZeroTools, a secure browser-native utility suite designed to process user inputs 100% locally on the client-side.
FeatureReleased a wide selection of offline-ready utilities spanning image editing, PDF tools, text converters, and financial simulators.