Dev tools · alternatives · 2026

CSVFiddle is a browser-based tool that lets users query CSV files using DuckDB, a SQL query engine. It runs entirely in the browser without requiring installation or server setup. The tool is designed for anyone who… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. CSVFiddle – Query CSV files with DuckDB in the browser launched in 2022; newer entries below may have overtaken it.

1. 1DU
   Duck-UI – Browser-Based SQL IDE for DuckDB▲213

   I built Duck-UI, a web-based SQL editor that runs DuckDB entirely in your browser via WebAssembly. No backend required. The Problem: Every time I needed to query csv, parquet, or even to play with SQL, I had to either: (a) spin up a Jupyter notebook (b) use the CLI (c) upload to a hosted service. Friction at every step (TOO MUCH to load a csv or even to test some sql (study)... The Solution: DuckDB's WASM runtime lets us run SQL analysis client-side. Load CSV/JSON/Parquet files from disk or URL, write SQL, get results instantly. Data stays on your machine. What It Does: SQL editor…

   2025 · demo.duckui.com · its alternatives →

2. 2
   WhatTheDuck – open-source, in-browser SQL on CSV files▲119

   WhatTheDuck is an in-browser sql tool to analyze csv files that uses duckdb-wasm under the hood. Please provide feedback/issues/pull requests.

   2024 · github.com · its alternatives →

3. 3
   cq – Query CSVs using SQL▲80

   Query CSVs using SQL. Contribute to jolmg/cq development by creating an account on GitHub.

   2019 · github.com · its alternatives →

4. 4
   SQL workbench in the browser▲117

   Free browser-based SQL editor powered by DuckDB. Query and visualize CSV, JSON, Parquet and Arrow files locally or from remote URLs. No installation required.

   2024 · sql-workbench.com · its alternatives →

5. 5
   Csvbox.io – CSV import button for a web app, SaaS or API▲155

   Drop a production-ready CSV, Excel, and PDF importer into your SaaS in minutes. Handle up to 2 million rows per import, with column mapping, validation, webhooks, and clean data delivered to your API.

   2021 · csvbox.io · its alternatives →

6. 6
   Open-source, browser-local data exploration using DuckDB-WASM and PRQL▲227

   Hey HN! We’ve built Pretzel, an open-source data exploration and visualization tool that runs fully in the browser and can handle large files (200 MB CSV on my 8gb MacBook air is snappy). It’s also reactive - so if, for example, you change a filter, all the data transform blocks after it re-evaluate automatically. You can try it here: https://pretzelai.github.io/ (static hosted webpage) or see a demo video here: https://www.youtube.com/watch?v=73wNEun_L7w You can play with the demo CSV that’s pre-loaded (GitHub data of text-editor adjacent projects) or upload…

   2024 · github.com · its alternatives →

7. 7
   WhatTheDuck – Browser-Based SQL Engine Powered by DuckDb on WASM▲11

   WhatTheDuck is a free-to-use tool that allows you to run SQL queries on your CSV files right in your browser. No data is sent anywhere. We've leveraged the power of DuckDB over WASM to make this possible. Do try it out and hit us with any feedback.

   2023 · whattheduck.incentius.com · its alternatives →

8. 8
   SQL query for CSV▲85

   Analyze CSV records using sql syntax right in your browser

   2022 · csv-query.com · its alternatives →

9. 9
   Dropbase▲227

   Turn your CSV and Excel files to live databases, instantly.

   2020 · its alternatives →

10. 10
    TextQuery – Query CSV, JSON, XLSX Files with SQL▲163

    Hiya HN! TextQuery is my sabbatical project that I have been working on for the past six months. It was born out of a personal pain point. Anytime I wanted to analyze raw CSV data, I had to create a schema first before I could import it for querying. And to create charts, I had to use yet another tool. I also disliked how bad charts from popular tools like Excel, Google Sheets looked like. I wanted an easier way to do this and TextQuery was my solution: an all-in-one tool to query CSV files using SQL and create beautiful visualizations as well. Currently, it's a macOS app and focused on CSV…

    2025 · textquery.app · its alternatives →

11. 11
    Dropbase 2.0▲147

    Import messy CSV/Excel to databases with auto map & validate

    2022 · its alternatives →

12. 12
    Query CSV files using SQL▲12

    Query CSV files using SQL. Contribute to rs86/csvsql development by creating an account on GitHub.

    2015 · github.com · its alternatives →

13. 13SQ
    SQLite query inside a Bash function▲134

    Part of the workflow for building my website is the generation of a table in tab-separated column format (.tsv). The source data is found in four other .tsv files. I use an SQLite query to perform a 4-way join and write out the new table. For convenience, I wrote a script that encapsulates the query inside a Bash function. The example below illustrates this technique. repertoire() { pushd $CMM_SOURCES&#x2F;_data sqlite3 <<EOS .headers on .mode tabs .import category.tsv category .import composition.tsv composition .import concert.tsv concert .import program.tsv program .once repertoire.tsv…

    2021 · its alternatives →

14. 14
    CSVshare▲184

    Instantly share CSV data and make it searchable

    2017 · csvshare.com · its alternatives →

15. 15
    Dropbase by Castodia▲110

    Turn your CSV files into live databases in seconds

    2020 · its alternatives →

16. 16
    Work with CSV files using SQL. For data scientists and engineers▲99

    A SQL spreadsheet desktop app that queries and visualizes CSV files using SQL.

    2021 · superintendent.app · its alternatives →

17. 17
    The DuckDB Local UI▲193

    Easily explore local data files with DuckDB

    2025 · github.com · its alternatives →

18. 18DT
    Dropbase – Turn your CSV files into live databases in seconds▲26

    2020 · dropbase.castodia.com · its alternatives →

19. 19
    soarSQL▲98

    The analytical SQL editor - powered by duckDB

    2025 · its alternatives →

20. 20CC
    Convert CSV files into MySQL insert scripts▲41

    2014 · database-import-scriptor.appspot.com · its alternatives →

21. 21
    SQL Polyglot▲53

    Try running a query anywhere from PostgreSQL to DuckDB without leaving your browser.

    2023 · codapi.org · its alternatives →

22. 22
    PondPilot – Run SQL on DuckDB/CSV/etc. Locally via WASM (Open-Source)▲6

    Hi HN! We built PondPilot – a fully client-side data exploration tool powered by DuckDB. It’s open-source and built for speed, privacy, and simplicity. Try it: https:&#x2F;&#x2F;app.pondpilot.io GitHub: https:&#x2F;&#x2F;github.com&#x2F;pondpilot&#x2F;pondpilot You can: - Run fast SQL queries directly in your browser - Explore CSV, Parquet, JSON, or .duckdb files without uploading - Keep your data 100% local (it never leaves your device) - Install as a PWA and work offline - Use it read-only, with real-time updates when files change It’s designed as a lightweight alternative to notebooks or…

    2025 · app.pondpilot.io · its alternatives →

23. 23
    Quak Query▲10

    Quick and dirty duckdb in the browser, parquet!

    2025 · quak.dev · its alternatives →

24. 24PF
    Pastebin for CSV▲12

    2014 · sharecsv.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →