MessyMatch

Compare, merge and split messy files in seconds.

What it does

MessyMatch helps you compare messy CSV, Excel, TXT, SQL or flat JSON files side by side (spot missing rows, near-duplicates and formatting mismatches in seconds). Use fuzzy matching to catch almost-identical values that exact comparison misses. Split large files into import-ready parts by row count or column value. Merge multiple sources into one clean output with deduplication and union schema. Everything runs in your browser. No formulas, no scripts, no account needed for small files.

Does the same job

all alternatives →

Pasteur by Intersect Labs2020 · ▲157
Clean messy data in minutes and without coding
Dropbase 2.02022 · ▲147
Import messy CSV/Excel to databases with auto map & validate
CF
CSV file merging2019 · mightymerge.io · ▲29
csvdiff.appJul 2026 · csvdiff.app · ▲9
Compare CSV files. Right in your browser
CA
csvdiff – a fast diff tool for comparing CSV files2019 · github.com · ▲21
SP
Secure private diffchecker with merge supportNov 2025 · diffchecker.dev · ▲17
Built a minimal diff checker with merge feature. 1. Supports 25K+ lines. 2. Character level instant diff. 3. Diff merge feature. 4. Share able links. 5. 100% secure, all diff computation happens in browser. No other website offering high quality diff checker and merge feature with just browser only implementation. Please review the website in detail and share feedback.

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