無料オンライン Gerber ビューア - View Gerber RS-274X & Excellon Drill Files Online for Free
無料オンラインGerberビューア - Gerber RS-274XとExcellonドリルファイルを無料で閲覧。ZIP一括インポート、多層オーバーレイ、ドラッグ＆ドロップ。ブラウザ内ローカル処理、アップロード不要。 Free Online Gerber Viewer - view Gerber and Excellon drill files online.
Drop your Gerber files here to start viewing — no registration, no upload, completely free.
Key Features
- Multi-layer Gerber RS-274X rendering — independent opacity, visibility toggle, and color-coded layers
- ZIP batch import with automatic decompression, macOS metadata filtering, and multi-file drag & drop
- Smart layer identification from filenames — auto-detects copper, solder mask, silkscreen, solder paste, drill, and board outline
- Precision measurement tools — single and continuous modes, real-time live preview during drag, distance, angle, dx/dy readout in mil or mm
- Real-time cross-probe cursor — continuous coordinate tracking across all layers on the canvas
- Customizable grid overlay — none, lines, dots, or crosshair modes; aligns to Gerber origin or bounding box
- Zoom controls — zoom in/out buttons, fit-to-view, zoom percentage input with scroll wheel support and expression evaluation
- Canvas flip / mirror view toggle for inspecting board from different perspectives
- Layer management panel — individual visibility eye icons, per-layer opacity sliders, global opacity control
- Automatic 32-color palette assignment per layer for clear visual distinction
Supported File Formats
- Gerber RS-274X (.gbr .ger .gtl .gbl .gts .gbs .gto .gbo .gtp .gbp .g1 .g2 .g3 .g4 .gp1 .gp2 .gp3 .gp4 .gm1 .gm2 .gm3 .gm4 .art .pho) — Full RS-274X aperture support for all standard Gerber extensions used by KiCad, Altium, Eagle, OrCAD, Allegro and more. Handles step-and-repeat, mirroring, and polarity operations.
- Allegro / PADS (.art .pho .p* .s* .m*) — Cadence Allegro artwork (.art) and PADS PCB Gerber output (.p* copper, .s* silkscreen, .m* mask). Common in advanced PCB design workflows.
- Excellon Drill (.drl .xln .txt .tap .npt .exc) — Comprehensive Excellon drill file parsing with tool table support, plated/non-plated hole detection, and slot routing commands.
- ZIP Archive (.zip) — Batch import multiple PCB files in a ZIP archive with automatic decompression and filtering of macOS metadata files.
- Gerber X2 / X3 with Attributes — Extended Gerber format support including X2 attributes and X3 meta-information for enhanced layer identification and smart naming.
Supported CAD Tools
KiCad, Altium Designer (Altium Protel), Autodesk Eagle, Cadence OrCAD, Cadence Allegro, DipTrace, gEDA, Siemens PADS (Mentor), Proteus PCB, Pulsonix, DesignSpark PCB, EasyEDA / LCSC, CircuitMaker, CircuitStudio, Target 3001!, Zuken CR-8000, Zuken BoardStation, Mentor Expedition PCB, P-CAD
How to Use
- Drag & drop your Gerber files onto this page, or click the folder icon in the toolbar to open files.
- Supported formats: Gerber RS-274X (.gbr .ger .gtl .gbl), Excellon drill (.drl .xln), ZIP archives, and more.
- Use the layer panel on the right to toggle visibility, adjust opacity, and reorder layers.
- Measure distances and angles with the measurement tool, toggle grid overlay, or flip the canvas for inspection.
Frequently Asked Questions
Gerberファイルとは何ですか？
Gerber RS-274XはPCB製造の業界標準ファイル形式です。銅層、ソルダーマスク、シルクスクリーン、ドリルデータを記述します。
このGerberビューアは本当に無料ですか？
はい、完全無料です。登録不要、サーバーへのアップロード不要、ファイルサイズ制限なし。すべてブラウザ内でローカル処理されます。
どのCADツールに対応していますか？
KiCad、Altium Designer、Autodesk Eagle、Cadence OrCAD/Allegro、DipTrace、gEDA、Siemens PADS、Proteusなど19種類のPCB設計ツールに対応。
複数のレイヤーを同時に表示できますか？
はい。複数レイヤーの重ね合わせ表示に対応。各レイヤーの不透明度、表示/非表示を独立して制御でき、自動色分けで簡単に識別できます。
ファイルはサーバーに送信されますか？
いいえ。すべての処理はブラウザ内のJavaScriptでローカル実行され、ファイルがデバイス外に出ることはありません。