Diff Tools

Compare and convert your files with our minimalist comparison tools. Analyze differences between spreadsheet formats and optimize file sizes with advanced compression analysis. Now including Image Diff with changes-only view, overlay/slider, perceptual ΔE, batch compare, and Web Worker acceleration.

Lightning Fast

Process files instantly in your browser with no uploads required

100% Private

All processing happens locally - your files never leave your device

No Registration

Start comparing and converting files immediately

Image Diff

Visual image comparison with changes-only view

Compare two images with overlay/slider/heatmap, perceptual ΔE threshold, auto-align, and batch export. 100% browser-based.

Changes-only view, denoise & cleanup

Overlay / Slider / Heatmap

Auto Align (offset/rotation/scale)

Numbers vs Excel Comparison

Compare Apple Numbers and Excel files side by side

Upload your .numbers and .xlsx files to instantly see differences highlighted row by row and column by column. Perfect for data validation and migration verification.

Cell-by-cell difference detection

Visual highlighting of changes

Detailed comparison statistics

CSV to Parquet Converter

Convert CSV to Parquet and analyze compression

Upload CSV files to convert them to Parquet format and see the compression ratio and file size savings. Ideal for data optimization and analytics workflows.

Advanced compression analysis

File size reduction metrics

Download optimized Parquet files

JSON Diff Tool

Fastest privacy-first JSON comparison

Compare JSON files with intelligent structure diff. No upload required, supports large files >5MB, Web Worker powered for ultimate performance.

Structure-aware JSON comparison

Web Worker for large files

One-click copy changes only