What file formats does the File Size Report tool support?

The tool accepts PDF, XLSX, XLS, CSV, DOCX, TXT, PNG, JPG, JPEG, WEBP, ZIP, and JSON files. You can mix formats in a single batch.

Does Deliteful modify my source files during the size report?

No. The tool reads file metadata only — your original files are never altered, recompressed, or transformed.

What unit system does the report use?

Sizes are reported in raw bytes and converted using base-1024 units: 1 KB = 1,024 bytes, 1 MB = 1,048,576 bytes. This matches the convention used by most operating systems and storage systems.

How many files can I include in one batch?

Up to 50 files per batch, with a combined size limit of 2 GB. Each file can be up to 500 MB for CSV, 300 MB for PDF, 200 MB for Excel, and 50 MB for other formats.

File Size Reports for Data Engineers: Audit Your Data Assets Fast

Before loading files into a pipeline, data engineers need to know exactly what they are dealing with — file sizes affect memory allocation, chunking strategy, and transfer costs. Deliteful's File Size Report tool generates a plain-text size audit for every uploaded file, showing raw bytes alongside KB, MB, and GB equivalents in seconds.

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Data pipelines fail in predictable ways when engineers underestimate input file sizes. A CSV that looks small in a file explorer might be 180 MB uncompressed — enough to blow a Lambda memory limit or stall an ETL job. Getting a reliable per-file size breakdown before ingestion is a basic sanity check that saves debugging time downstream.

Deliteful supports up to 50 files per batch (up to 2 GB total), covering PDF, CSV, Excel, JSON, ZIP, images, and more. The output is a clean .txt report with tab-separated filenames, raw byte counts, and human-readable sizes using base-1024 units. No transformation is applied to your source files — they are never modified.

How it works

1
Sign in with Google
Create your free Deliteful account in about 3 clicks — no credit card required.
2
Upload your files
Drag and drop up to 50 files (any supported format) into the uploader.
3
Run the report
Deliteful processes your batch server-side and returns a .txt report listing each file's size in bytes and human-readable units.
4
Download and use
Save the report to your pipeline documentation or use it to inform chunking and memory allocation decisions.

Frequently asked questions

What file formats does the File Size Report tool support?: The tool accepts PDF, XLSX, XLS, CSV, DOCX, TXT, PNG, JPG, JPEG, WEBP, ZIP, and JSON files. You can mix formats in a single batch.
Does Deliteful modify my source files during the size report?: No. The tool reads file metadata only — your original files are never altered, recompressed, or transformed.
What unit system does the report use?: Sizes are reported in raw bytes and converted using base-1024 units: 1 KB = 1,024 bytes, 1 MB = 1,048,576 bytes. This matches the convention used by most operating systems and storage systems.
How many files can I include in one batch?: Up to 50 files per batch, with a combined size limit of 2 GB. Each file can be up to 500 MB for CSV, 300 MB for PDF, 200 MB for Excel, and 50 MB for other formats.

Create your free Deliteful account with Google and get a per-file size report for your entire data batch in seconds.