Data tools on it.you handle the file conversion and data wrangling tasks that come up constantly in data engineering, backend development, and IT support: opening a CSV to inspect its structure, converting a spreadsheet export to JSON for an API import, turning JSON output into CSV for a stakeholder report, generating a SHA-256 checksum to verify a downloaded file, or embedding an image directly into HTML using Base64.

All data tools run entirely in your browser. Files are processed locally using the File API and JavaScript — no data is uploaded to any server. This is essential when working with exports from databases or internal systems that contain personally identifiable information, financial data, or proprietary records.

Who uses these tools?

Data analysts

Inspect CSV exports, convert between formats, validate JSON structure before loading into a database.

Backend developers

Convert between CSV and JSON when integrating with third-party APIs or data pipelines.

DevOps & sysadmins

Generate checksums for downloaded binaries, verify file integrity, embed assets in config files.

IT support teams

Quickly preview CSV exports without opening Excel, verify downloaded patches have not been tampered with.

What's in this category?

CSV Viewer

Open and view CSV files as a formatted table.

CSV to JSON Converter

Convert CSV files to JSON format instantly.

JSON to CSV Converter

Convert JSON arrays to CSV format for spreadsheets.

Image to Base64

Convert images to Base64 data URIs for embedding in HTM

Tool types in this category

Type	Count	How it works	Privacy
Browser-only	4	Runs entirely in your browser — no server requests	No data leaves your device

Key concepts

CSV (Comma-Separated Values) — A plain-text format where each line represents a row and fields are separated by commas (or other delimiters). The most universal data exchange format for spreadsheets and databases.

JSON (JavaScript Object Notation) — A lightweight text-based data format using key-value pairs, arrays, and nested objects. The standard for REST API request/response bodies and configuration files.

Base64 data URI — A way to embed binary data (images, fonts) directly in HTML or CSS as text strings. Eliminates a separate file request but increases payload size by ~33%.

File checksum — A fixed-length hash (MD5, SHA-1, SHA-256) computed from a file's contents. If even one byte changes, the hash changes — used to verify downloads haven't been corrupted or tampered with.

TSV (Tab-Separated Values) — Like CSV but uses tabs as delimiters. Common in bioinformatics and some database exports where values may contain commas.

Frequently asked questions

Can I open large CSV files in the browser viewer?

The CSV viewer processes files locally in your browser. Very large files (100MB+) may be slow depending on available RAM, but there is no server-side size limit. Performance varies by browser.

What is the difference between CSV and TSV?

CSV uses commas as delimiters; TSV uses tabs. TSV avoids ambiguity when field values themselves contain commas. Most spreadsheet applications can export both formats.

How do I verify a file download using a checksum?

The software publisher provides the expected SHA-256 hash alongside the download. After downloading, run the file through the checksum tool and compare the output. Any mismatch means the file was corrupted or tampered with.

When should I use Base64 to embed images vs referencing them as files?

Use Base64 for small icons or critical above-the-fold images that you want to avoid a separate request for. Avoid Base64 for large images — the size overhead (~33%) outweighs the saved request.

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