CONVERT XLSX → TSV (XLSX to TSV)
Fast, secure XLSX to TSV conversion. No registration required.
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HOW TO CONVERT XLSX → TSV
Upload the XLSX
Drop your file into the browser uploader. We transfer over HTTPS and queue the conversion.
Convert through libreoffice
Our libreoffice-based pipeline reads the XLSX, applies the right decoder and emits a faithful TSV.
Download the TSV
Grab the result when it lands. Both files delete automatically within two hours — nothing lingers on our servers.
XLSX is Excel's Office Open XML workbook format, replacing the older .xls binary. Reaching a TSV from there is one hop. Converting XLSX to TSV fixes the mismatch between a file you have and the tool that needs to open it. KaijuConverter runs the conversion with the right backend for the job (libreoffice), keeps the source file untouched and deletes both XLSX and TSV copies within two hours. No account required, nothing installed locally. Technical note: XLSX is Excel's Office Open XML workbook format, replacing the older .xls binary. Compare that with TSV is the tab-separated values variant of CSV, common in data pipelines.
Why convert XLSX to TSV
TSV is better supported than XLSX in the workflow you are targeting. Converting trades any niche advantages of XLSX for broad compatibility, and the conversion itself is fast because the two formats share the same conceptual content.
XLSX vs TSV — Technical specifications
Side-by-side comparison of the technical details.
XLSX
- MIME type
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- Container
- ZIP (Office Open XML)
- Max rows
- 1,048,576
- Max columns
- 16,384
- Released in
- Microsoft Office 2007
- Variants
- .xlsx, .xlsm (macros), .xlsb (binary)
- MIME Type
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- Extension
- .xlsx
- Category
- Spreadsheets & Data
- Full Name
- Excel Spreadsheet
- Conversion Engine
- PANDOC
TSV
- MIME type
- text/tab-separated-values
- MIME Type
- text/tab-separated-values
- Extension
- .tsv
- Category
- Spreadsheets & Data
- Full Name
- TSV (Tab-Separated Values)
- Conversion Engine
- PANDOC
- Extensions
- .tsv, .tab
- Standard
- IANA registration (1993), IETF RFC unofficial
- Delimiter
- Tab (ASCII 9)
- Encoding
- UTF-8 (convention)
| Specification | XLSX | TSV |
|---|---|---|
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | text/tab-separated-values |
| Container | ZIP (Office Open XML) | — |
| Max rows | 1,048,576 | — |
| Max columns | 16,384 | — |
| Released in | Microsoft Office 2007 | — |
| Variants | .xlsx, .xlsm (macros), .xlsb (binary) | — |
| MIME Type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | text/tab-separated-values |
| Extension | .xlsx | .tsv |
| Category | Spreadsheets & Data | Spreadsheets & Data |
| Full Name | Excel Spreadsheet | TSV (Tab-Separated Values) |
| Conversion Engine | PANDOC | PANDOC |
| Extensions | — | .tsv, .tab |
| Standard | — | IANA registration (1993), IETF RFC unofficial |
| Delimiter | — | Tab (ASCII 9) |
| Encoding | — | UTF-8 (convention) |
XLSX vs TSV — Strengths and limitations
What each format does best, and where it falls short.
XLSX Strengths
- Much smaller than legacy .xls files thanks to ZIP + XML.
- Human-readable structure — easy to extract data programmatically.
- Supports macros (as .xlsm variant), charts, pivot tables, conditional formatting.
- Universal support: Excel, LibreOffice, Google Sheets, Numbers, pandas.
- ISO/IEC 29500 standardized.
Limitations
- Macros in .xlsm are a common malware vector — disabled by default in Office.
- 1M-row limit is a cultural problem — people put too much data in Excel.
- Subtle formula differences between Excel, LibreOffice, and Sheets.
TSV Strengths
- No quoting needed — tabs in data are astronomically rare.
- Simpler parser than CSV.
- Preferred by databases, bioinformatics, and scientific pipelines.
- Opens cleanly in every spreadsheet app.
- Plain text, grep-friendly, diffable.
Limitations
- Tabs can be invisibly replaced with spaces by text editors.
- Carriage returns inside fields require escaping conventions.
- Less ubiquitous than CSV in business/consumer workflows.
Quality & Compatibility
The conversion preserves the important content and lets you control quality trade-offs through Advanced options. Lossless paths produce TSV output that matches the XLSX content exactly; lossy paths re-encode at transparent defaults unless you request otherwise. Metadata transfers where both formats support it.
Tips for Best Results
- Always keep the original XLSX file alongside the TSV — you may need it later if requirements change.
- Check a small sample of the TSV in its destination application before batch-converting a large archive.
- For recurring conversions, the REST API on paid plans automates the whole pipeline programmatically.
Frequently Asked Questions
Yes. The free tier accepts files up to 25 MB without registration, email capture or watermarks; paid plans go up to 2 GB. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited — the output is exactly the same as on any paid plan.
Uploads run over HTTPS, files are processed in isolated containers, and both the source XLSX and the TSV output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Excel Spreadsheet
Source formatXLSX is the modern Microsoft Excel format based on Open XML. It is the industry standard for spreadsheets, supporting formulas, charts, pivot tables, and conditional formatting.
TSV (Tab-Separated Values)
Target formatTSV uses tabs instead of commas to separate values in tabular data. It avoids quoting issues common in CSV when data contains commas, making it popular for scientific and linguistic data.
Going the other way? Convert TSV back to XLSX with the same engine.
Common Use Cases
Share across platforms
Send TSV files to anyone without worrying about whether they have the right software for XLSX.
Embed in documents
Drop TSV output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
TSV often produces smaller files than XLSX for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
XLSX vs TSV — Typical file sizes
Approximate file sizes for common scenarios.
- Small budget spreadsheet 20–80 KB
- Financial model with charts 1–10 MB
- Large dataset (100k rows) 10–50 MB
- Small data export 1-50 KB
- Typical database dump 1-500 MB
- Genome annotation file 100 MB - 50 GB
Sensitive Documents, Scanned OCR, or 500+ Pages?
For legally sensitive archives that must never leave your local network, or multi-hundred page scanned PDFs needing optical character recognition, local document workstations ensure full compliance.
One-time payment with zero recurring commitment: convert files up to 1 GB, OCR, PDF/A, and .ZIP batches for 24 hours.
Full 7 days of unlimited conversions, up to 2 GB per file, 100% ad-free with zero subscription.
High-throughput enterprise pipeline for files up to 2,048 MB, 50-file batches, ISO PDF/A, and priority processing.
Offline conversion for multi-hundred page contracts, spreadsheets, and local optical extraction.
High-accuracy legal OCR, certified PDF/A archiving, and compliant document redaction.
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
XLSX Format: Inside Microsoft Excel's Open XML Spreadsheet
Complete guide to XLSX format: ZIP+XML structure, shared string table, date serial numbers, cell styles, formula caching, openpyxl programming, pandas...
Read guide →CSV and TSV Format: The Complete Technical Guide
Master CSV and TSV: RFC 4180 grammar, proper parsing with csv libraries, encoding pitfalls (UTF-8 BOM), dialect differences, type inference surprises, large...
Read guide →TSV Format: The Complete Guide to Tab-Separated Values
Everything about TSV: tab delimiter advantages, comparison with CSV, bioinformatics uses, handling TSV in Python/pandas/Excel, and converting TSV to CSV or...
Read guide →
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