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  2. Smallpdf.com - Wikipedia

    en.wikipedia.org/wiki/Smallpdf.com

    Smallpdf is a Swiss online web-based PDF software, founded in 2013. [2] It offers free version with limited features to compress, convert and edit PDF documents. [ 3 ] And its paid version offers advanced features like OCR, compress, and more [ 4 ] .

  3. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.

  4. List of archive formats - Wikipedia

    en.wikipedia.org/wiki/List_of_archive_formats

    The replacement for the .sit format that supports more compression methods, UNIX file permissions, long file names, very large files, more encryption options, data specific compressors (JPEG, Zip, PDF, 24-bit image, MP3). The free StuffIt Expander is available for Windows and OS X. .sqx SQX: Windows: Windows: Yes A royalty-free compressing format

  5. LHA (file format) - Wikipedia

    en.wikipedia.org/wiki/LHA_(file_format)

    LHA or LZH is a freeware compression utility and associated file format. It was created in 1988 by Haruyasu Yoshizaki ( 吉崎栄泰 , Yoshizaki Haruyasu ) , a doctor, and originally named LHarc . A complete rewrite of LHarc, tentatively named LHx , was eventually released as LH .

  6. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Best Compression (no preset dictionary) 78 20: x␠ No Compression (with preset dictionary) 78 7D: x} Best speed (with preset dictionary) 78 BB: x» Default Compression (with preset dictionary) 78 F9: xù: Best Compression (with preset dictionary) 62 76 78 32: bvx2: 0 lzfse LZFSE - Lempel-Ziv style data compression algorithm using Finite State ...

  7. Lossy compression - Wikipedia

    en.wikipedia.org/wiki/Lossy_compression

    The most widely used lossy compression algorithm is the discrete cosine transform (DCT), first published by Nasir Ahmed, T. Natarajan and K. R. Rao in 1974. Lossy compression is most commonly used to compress multimedia data (audio, video, and images), especially in applications such as streaming media and internet telephony. By contrast ...

  8. zlib - Wikipedia

    en.wikipedia.org/wiki/Zlib

    zlib (/ ˈ z iː l ɪ b / or "zeta-lib", / ˈ z iː t ə ˌ l ɪ b /) [2] [3] is a software library used for data compression as well as a data format. [4] zlib was written by Jean-loup Gailly and Mark Adler and is an abstraction of the DEFLATE compression algorithm used in their gzip file compression program. zlib is also a crucial component of many software platforms, including Linux, macOS ...

  9. ARJ - Wikipedia

    en.wikipedia.org/wiki/ARJ

    ARJ (Archived by Robert Jung) is a software tool designed in 1991 by Robert K. Jung for creating high-efficiency compressed file archives. ARJ is currently on version 2.86 for MS-DOS and 3.20 for Microsoft Windows and supports 16-bit, 32-bit and 64-bit Intel architectures.

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