BIG Converter

Try our offline BIG file converter. Every year thousands of users around the world save thousands of hours using reaConverter!

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reaConverter
Convert
BIG Files
Online

How to Convert .big Files in Bulk

1. Install reaConverter

Download reliable BIG conversion software to convert multiple .big files and folders in one go.
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Install reaConverter

2. Select BIG Files

Select BIGs from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load BIG files

3. Start Conversion

Click Convert to start the bulk conversion of all selected BIG files. The process will begin right away.
reaConverter - Start BIG conversion

Convert BIG on your PC

For quick and effortless BIG file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.

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Do more with your files

Converting BIG files for use in a larger project? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on August 26, 2025
"Exactly what I needed! Simple, fast, and no bloat. I use reaConverter Lite to resize and convert batches of images for documents. The presets make it super easy, and everything works smoothly."
Mark Jones
Mark Jones
Happy User
"reaConverter's automation tools have completely changed how I manage my projects. I often work with large batches of illustrations and used to spend hours converting and organizing them. Now, with Watch Folders, I just set the rules once and everything is handled automatically, exactly how I need it. This is pro-level automation made simple."
Chloe M.
Chloe M.
Freelance Illustrator
"I use the online converter — it’s quick and hassle-free!"
Jian Wong
Jian Wong
Happy Online User
"reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud."
Malik T. Martin
Malik T. Martin
Satisfied Customer
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User
"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer

BIG files: Frequently Asked Questions

What are BIG files?

The Michelin maps are recognized by the BIG file extension. These maps have a rich heritage dating back to 1905 when the first printed version was introduced in France. Designed primarily for motorists, the Michelin maps have now transitioned into the digital age and are readily available in digital format.

Can reaConverter open BIG files?

reaConverter fully supports the BIG file format – open, edit, and export BIG files to any other popular file format with ease.

How do I change BIG to another format?

reaConverter is a user-friendly tool for converting BIG files. Once installed on your computer, it allows you to convert all your .big files at once with just a few clicks. You can even convert big images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert BIG online?

If you only want to convert a few BIG files, you are welcome to try our free online BIG converter.

How can I turn BIG files on my computer to another format?

The best way to convert BIG files on your PC is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from BIG.

How can I automate BIG files conversion?

reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.

Can I convert BIG files using scripts or the command-line interface?

reaConverter provides full access to all its features from the Windows command-line shell, including the command-line big converter.

What else can I do with reaConverter?

Convert DICOM filesResize pictureConvert vector filesConvert picture color spaceCopy IPTC data

What formats can I convert a BIG file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  hpg  hru  ico  iff  iges  igs  jp2  jpeg  jpg  jxl  jxr  mif  mtv  pcl  pct  pcx  pdf  pgm  pic  plt  png  ppm  prc  ps  psd  qoi  qrt  rad  rla  sgi  shp  svg  svgz  tga  tif  tiff  webp  webpll  wmf  wmz  wpg  wrl  xbm  xpm 

Discover more

Explore our efficient BIG file converter that saves you time and effort by converting multiple .big files into different formats.
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