8 Data Processing Tools That Will Supercharge Your Workflow in 2026
If you've ever spent hours manually cleaning datasets, removing duplicates, or trying to make sense of messy CSV files — you already know how painful data processing can be. Whether you're a developer preparing data for an API, a data analyst working with exports from multiple tools, or a researcher wrangling experimental results, the repetitive tasks add up fast.
The good news: you don't have to do this manually. In this article, I want to walk you through 8 essential data processing tools available free on ElysiaTools that have genuinely transformed how I handle data — from sorting arrays in seconds to intelligently filling in missing data points.
1. Array Sorter — Sort Anything, Anyway You Want
Array Sorter is the tool I reach for first when I need to organize data. It handles arrays of any type — strings, numbers, dates, even mixed content — and offers sorting methods that go far beyond the basics.
What sets it apart: natural sorting. If you've ever tried sorting file names like file1.txt, file2.txt, file10.txt alphabetically, you know the frustration — file10.txt comes before file2.txt. Natural sort fixes this instantly. The tool also supports random shuffle (Fisher-Yates algorithm), reverse order, case-insensitive matching, and automatic whitespace trimming.
I've used this countless times when preparing test data for frontend development. Instead of writing a quick script or doing it manually in a spreadsheet, one paste-and-click gives me clean, sorted output with full metadata about what was processed.
2. Data Deduplicator — Clean Your Lists Without Losing Quality
Duplicate records are everywhere — customer lists from multiple form submissions, survey responses collected across channels, database exports that got merged incorrectly. Data Deduplicator handles this with surprising intelligence.
The feature I find most valuable is fuzzy matching. It's not just looking for exact matches — it can detect records that are nearly identical, like [email protected] and john @example.com (extra space). You control the similarity threshold, so you decide how strict the matching should be.
It also lets you choose which record to keep when duplicates are found: the first, the last, or the most complete one (with the most filled-in fields). For marketing teams cleaning up email lists, this alone saves hours of manual work.
3. Data Interpolator — Fill the Gaps in Your Time Series
Missing data is a fact of life in real-world datasets. Sensor outages, missed survey responses, API timeouts — the gaps happen. Data Interpolator gives you multiple mathematically-grounded ways to fill them.
For time series data specifically, this tool is exceptionally useful. You can choose between:
- Linear interpolation — draw a straight line between known points
- Polynomial fitting — curve-match to your data's underlying trend
- Spline / Cubic interpolation — smooth curves through data points
- Forward / Backward fill — carry the last known value forward or backward
- Mean / Median imputation — statistical approaches for quick estimates
What I appreciate is the gap size limit. You can tell the tool to only fill small gaps (e.g., up to 5 consecutive missing values) and leave larger discontinuities alone — because filling a week-long sensor outage with interpolated values would create false confidence in your data.
4. CSV Filter — Query Your Spreadsheets Like a Database
CSV Filter turns your CSV file into a queryable dataset. Instead of opening a spreadsheet and manually scrolling through rows, you can filter by any column using 12 different operators: equals, not equals, contains, greater than, less than, starts with, ends with, is empty, and more.
You can stack multiple conditions — filter by status equals "active" AND score greater than or equal to 80 — and output the result as CSV, JSON, or a summary report. This is incredibly useful for developers who receive CSV exports from clients and need to quickly extract a specific subset of records.
No more Excel formulas or manual filtering. Paste the data, set your conditions, get your result.
5. Data Cleaner — One Tool to Clean Them All
Data Cleaner is the kitchen sink of data cleaning — and I mean that as a genuine compliment. It tackles the messy reality of real-world data with a comprehensive set of operations:
- Fixes 40+ common spelling errors automatically
- Standardizes email addresses to lowercase
- Normalizes phone number formats
- Handles case style (lowercase, UPPERCASE, Title Case, Sentence case)
- Standardizes date formats across your dataset
- Normalizes number formats for international data
- Removes duplicate records
- Fills missing values using previous-value imputation
The report it generates at the end is particularly useful — it tells you exactly what was changed, how many spelling errors were fixed, how many duplicates were removed, and overall data quality metrics. This kind of transparency matters when you're cleaning data that others will use downstream.
6. Group By — Aggregate Data Without Writing Code
Group By uses lodash's _.groupBy under the hood to organize items by any property. You provide a JSON collection and a property path, and it instantly groups records together.
For example, if you have a list of transactions with a category field, Group By will organize them into separate arrays — one per category. This is invaluable for preparing data for analytics dashboards, generating reports by segment, or restructuring data for a different visualization tool.
It accepts both JSON arrays and objects, and supports both identity and property/path iteratees. If you've ever needed quick aggregations without spinning up a Python script or opening a Jupyter notebook, this is the tool for you.
7. Chunk Array — Handle Large Arrays in Bite-Sized Pieces
When working with large arrays in JavaScript or TypeScript, you often need to process them in batches — for API calls with rate limits, pagination logic, or simply to prevent memory issues. Chunk Array handles this elegantly.
You specify the chunk size (up to 100 elements), paste your array, and it returns a nested array — for example, with chunk size 3 becomes ,,]. This works with any JSON array type — numbers, strings, objects, mixed.
Common use cases: batch processing for Stripe or Twilio API calls, splitting a large user list into email campaign batches, or preparing data for paginated UI components. The tool preserves all element types, so your objects stay intact.
8. Flatten Array — Simplify Nested Structures Instantly
Deeply nested arrays are common in data from APIs, document databases, or complex spreadsheet exports. Flatten Array collapses them one level at a time using lodash's _.flatten.
This is particularly useful as a preprocessing step before passing data to other tools. For example, if you have ,] from a spreadsheet export, Flatten Array gives you instantly. If you need to go deeper, you can run it multiple times.
It's a small tool with a very specific job — but if you've ever spent time writing recursive functions to flatten nested JSON for a frontend component, you'll appreciate how fast this is.
How These Tools Work Together
The real power comes from chaining these tools. Here's a typical workflow I've used:
- CSV Filter → extract only the records you need from a large export
- Data Deduplicator → remove duplicate entries
- Data Cleaner → fix formatting issues and standardize values
- Data Interpolator → fill any remaining gaps in time series columns
- Array Sorter / Group By → organize the cleaned data
- Chunk Array / Flatten Array → prepare the final output for your application
Each step takes seconds. Together, they replace what could be hours of manual work or a complex script.
Data processing doesn't have to be tedious. Whether you're cleaning up a one-off dataset or building repeatable data pipelines, these 8 tools from ElysiaTools cover the most common operations — sorting, deduplication, gap-filling, filtering, cleaning, grouping, batching, and flattening — without requiring any coding.
They're free, they run in your browser, and they process data locally (nothing is uploaded to a server). If you work with data regularly, bookmark elysiatools.com — you won't regret it.
