Real-World Performance Benchmarks
15 Million Rows.
67 Seconds. In Your Browser.
All tools process files client-side in your browser using Web Workers and streaming architecture. Zero uploads, zero data exposure.
Benchmarks conducted by SplitForge engineering team. Results vary by hardware, browser, and file complexity (±15–20%).
Runs locally · No file upload · Chrome 132 / Win 11 · See methodology
How We Achieve These Numbers
Streaming Architecture
Process files chunk-by-chunk without loading entire datasets into memory
Client-Side Processing
All computation happens in your browser - your data never leaves your device
Web Workers
Multi-threaded processing keeps UI responsive even with massive files
Optimized Algorithms
FNV-1a hashing, binary operations, and zero-copy buffers for maximum speed
Tool Performance Overview
CSV Tools
Verified
CSV Merger
Capacity
15M+ rows
Speed
223K rows/sec
14× Excel limit
View Benchmark
Verified
Remove Duplicates
Capacity
10M+ rows
Speed
435K rows/sec
10× Excel limit
View Benchmark
Verified
Find & Replace
Capacity
10M+ rows
Speed
196K rows/sec
2M replacements
View Benchmark
Verified
CSV Splitter
Capacity
10M+ rows
Speed
351K rows/sec
1,000 files
View Benchmark
Verified
Column Operations
Capacity
1M+ rows
Speed
34K rows/sec
Complex transforms
View Benchmark
Verified
Split Column
Capacity
10M+ rows
Speed
819K rows/sec
12 sec processing
View Benchmark
Verified
Format Converter
Capacity
10M+ rows
Speed
537K rows/sec
JSON/JSONL/Excel — zero upload
View Benchmark
Verified
Delimiter & Encoding
Capacity
10M+ rows
Speed
303K rows/sec
1.26 GB processed
View Benchmark
Verified
Pivot & Unpivot
Capacity
10M+ rows
Speed
333K rows/sec
30 sec processing
View Benchmark
Verified
CSV Compare
Capacity
10M+ rows
Speed
360K rows/sec
Cell-level diffs
View Benchmark
Verified
VLOOKUP/Join
Capacity
5M+ rows
Speed
212K rows/sec
7 join types
View Benchmark
Verified
Data Validator
Capacity
10M+ rows
Speed
500K rows/sec
CRM presets + uniqueness
View Benchmark
Verified
Pattern Extraction
Capacity
5M+ rows
Speed
111K rows/sec
551K patterns found
View Benchmark
Verified
Data Profiler
Capacity
10M+ rows
Speed
93K rows/sec
Mathematically verified
View Benchmark
Verified
Data Masking
Capacity
10M+ rows
Speed
250K rows/sec
PII anonymization
View Benchmark
Verified
Aggregate & Group
Capacity
10M+ rows
Speed
290K rows/sec
19 functions, SQL-style
View Benchmark
Verified
Data Cleaner
Capacity
10M+ rows
Speed
435K rows/sec
10× Excel limit
View Benchmark
Excel Tools
Verified
Excel Splitter
Capacity
1M+ rows
Speed
50K rows/sec
20 sec processing
View Benchmark
Verified
Excel CSV Converter
Capacity
1M+ rows
Speed
100K rows/sec
10 sec processing
View Benchmark
Verified
Excel JSON Converter
Capacity
1M+ rows
Speed
93K rows/sec
10.7 sec processing
View Benchmark
Verified
Excel Cleaner
Capacity
1M+ rows
Speed
72K rows/sec
13.88 sec processing
View Benchmark
Verified
Excel Sheet Extractor
Capacity
100K+ rows
Speed
17K rows/sec
5.7 sec processing
View Benchmark
Verified
Excel Compare
Capacity
1M+ rows
Speed
184K cells/sec
21 sec processing
View Benchmark
Verified
Excel Column Extractor
Capacity
1M+ rows
Speed
47K rows/sec
21 sec processing
View Benchmark
Verified
Excel Sheet Merger
Capacity
2M+ rows
Speed
57K rows/sec
35 sec processing
View Benchmark
Verified
Excel Repair
Capacity
1M+ rows
Speed
44K rows/sec
Formula preservation
View Benchmark
Verified
Excel Preview
Capacity
1M+ rows
Speed
312K rows/sec
3.2 sec load
View Benchmark
Run the Benchmark Yourself
Drop any file into any tool. No signup, no upload, no waiting. Processing starts the moment you select a file.
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