There are numerous file formats and extensions in this computer dependent world. In certain situations, you may need to convert your file formats. For example, if your resume is in docx format but the company receives only resumes in PDF format, then you have to convert your docx resume to PDF resume.

Here, I am sharing a list of 10 free websites where you can convert your files and documents easily without any costs.

It is a free website to convert your files and it supports various extensions and formats. You can upload any file under 100 MB size and download your converted file through an unique link.
Online-convert has following converters:
a. Audio Converter (AAC, AIFF, FLAC, M4A, MP3, OGG, OPUS, WAV, WMA)
b. Video Converter (3G2, 3GP, AVI, FLV, MKV, MOV, MP4, MPEG-1, MPEG-2, OGG, WEBM, WMV)
c. Image Converter (BMP, EPS, GIF, HDR/EXR, ICO, JPEG, PNG, SVG, TGA, TIFF, WBMP, WebP)
d. Document Converter (DOC, DOCX, Flash, HTML, ODT, PDF, PPT, PPTX, RTF, TXT)
e. EBook Converter (AZW, ePub, FB2, LIT, LRF, MOBI, PDB, PDF, TCR)
f. Archive Converter (7Z, TAR.BZ2, TAR-GZ, ZIP)

This website converts other file formats to PDF and vice versa. Their service is absolutely free. It doesn't have any restriction on file size. Email is not required for converting files.
Convert Online Free has following converters:
a. Word to PDF converter (DOC, DOCX to PDF)
b. Other documents to PDF converter ( RTF, ODT, MHT, HTM, HTML, TXT, FB2, DOT, DOTX, XLS, XLSX, XLSB, ODS, PPT, PPTX, PPS, PPSX, ODP to PDF)
c. Image to PDF converter (JPG, JPEG, PNG, BMP, GIF, TIF, TIFF to PDF)
e. PDF to TXT converter
f. PDF to JPG converter

This website converts files under 2 MB for free. It also doesn't require email for converting your files.
PDF Online has following converters:
a. PDF to word converter
b. PDF to HTML converter
c. Word to PDF converter
d. JPG to PDF converter
e. Web to PDF converter

This website converts various formats to PDF and vice versa. The maximum size limit of a document is 2MB. Email is required to obtain converted document.
Free PDF Convert has following converters:
a. PDF converter
b. PDF to Word converter
c. PDF to image converter
d. PDF to Excel converter
e. PDF to PowerPoint converter

This website offers free online and paid offline converters. It converts basic file formats we use.
PDF to Word has following converters:
a. PDF converter
b. Word converter
c. Excel converter
d. PowerPoint converter

I hope this list of websites will help you to convert your files online for free.