CSViser

Free online CSV validator and cleaner. Fix encoding, duplicates, column types, date formats, and export to XLSX or JSON — no code required.

CSViser is an online CSV validation and cleaning tool that fixes common data quality issues without writing code.

Upload a CSV (or XLSX/JSON) and get an instant RFC 4180 validation report with plain-English error explanations. Then fix detected problems in one click: remove blank rows, trim whitespace, unify NULL variants, normalize character encoding (Windows-1251/CP1252 → UTF-8), strip BOM, fix mixed line endings, convert delimiters (semicolon/tab/pipe → comma).

Beyond basic fixes: - Deduplication — exact and fuzzy (Levenshtein) by all columns or a key column - Column type validation and conversion — dates, numbers, emails, phone numbers (E.164), URLs, booleans, currencies - Search & replace — substring, exact match, or regex with 24 built-in presets - Row filter — delete rows matching a column value - PII anonymization — redact or mask emails, phones, credit cards, SSNs, IP addresses - Split file — by row count, file size, or column value; output as ZIP - Merge files — inner, left, and full outer join by key column - Export — CSV, XLSX, JSON, Markdown - REST API — programmatic processing with Bearer token auth and webhook delivery

Free plan: all features, files up to 500 rows. Pro plan: unlimited.

A startup from Ukraine.

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Pricing:

Freemium
$9 / Monthly (Pro)
Official Pricing

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CSViser Reviews and Details

This page is designed to help you find out whether CSViser is good and if it is the right choice for you.

#CSV Tools #CSV Converters #File Converter #SaaS #Data Validation

Screenshots and images

Main page //
2026-08-20
Result page //
2026-08-20
Export page //
2026-08-20

Features & Specs

Specialized CSV Handling

As a tool focused specifically on CSV files, it likely offers streamlined features for viewing, editing, and managing CSV data without the overhead of general-purpose spreadsheet software.
Web-Based Accessibility

Being an online tool, it can typically be accessed from any device with a browser, eliminating the need for software installation and enabling quick access to CSV files from anywhere.
User-Friendly Interface

CSV-focused tools often prioritize simplicity, making it easier for users to quickly view and interpret data without navigating complex menus found in full spreadsheet applications.
Quick File Processing

Dedicated CSV tools are often optimized for fast loading and processing of CSV files, which can be beneficial when working with large datasets compared to general-purpose applications.
No Installation Required

Since it operates as a web application, users can avoid the hassle of downloading and installing software, saving time and system storage space.

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Public traffic stats of CSViser

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Domain Rating (DR)

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Domain Authority (DA)

Check the "Domain Authority" of CSViser on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
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Is CSViser good? This is an informative page that will help you find out. Moreover, you can review and discuss CSViser here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.