Format library

File Format Tools and Guides

Start with the file you have. Each format page brings its browser tools, sample files, troubleshooting guides, and software comparisons into one place.

.json / .jsonl

JSON

Merge, split, inspect, flatten, and convert structured data.

8 tools / 21 guides

.csv

CSV

Combine tabular files and choose a suitable CSV editor.

1 tool / 4 guides

.xml

XML

Merge, split, validate, edit, and inspect XML documents.

2 tools / 6 guides

.yaml / .yml

YAML

Merge configuration files and find schema-aware editors.

1 tool / 7 guides

.vcf

VCF

Merge, preview, edit, and convert vCard contact files.

2 tools / 3 guides

.gpx

GPX

Combine GPS tracks and choose an editor for each platform.

1 tool / 4 guides

.md / .markdown

Markdown

Combine Markdown documents and improve writing workflows.

1 tool / 5 guides

.html / .htm

HTML

Combine web documents and choose an HTML editing workflow.

1 tool / 2 guides

.xlsx / .xls

Excel

Merge spreadsheets and move structured data into Excel.

1 tool / 1 guide

.txt

TXT

Merge, split, and convert plain-text files.

5 tools / 0 guides

.svg

SVG

Choose a vector editor that fits your operating system.

0 tools / 3 guides

.epub

EPUB

Choose an EPUB reader for a device and reading style.

0 tools / 6 guides

.mobi

MOBI

Open older Kindle-format books on modern devices.

0 tools / 2 guides

Available file formats