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Rhad ac am ddim Cywasgydd PDF

Cywasgu ffeiliau PDF i leihau eu maint. Dim colli ansawdd, dim terfyn maint ffeil.

Dim cyfyngiad maint ffeilMae ffeiliau'n aros yn breifatNid oes angen mewngofnodiAm ddim am byth

Gollwng ffeiliau yma, neu cliciwch i bori

PDF dim cyfyngiad maint ffeil

Pori ffeiliau

Nid yw eich ffeiliau byth yn gadael eich dyfais. Mae'r holl brosesu yn digwydd yn lleol yn eich porwr.

πŸ’‘ Scanned or image-heavy PDFs shrink the most with the image options. Text-only PDFs are usually already small β€” if nothing helps, we’ll tell you the file is already optimized rather than hand you a bigger one.

Optimize for your platform

Compress PDF for EmailCompress PDF for UploadCompress PDF for ArchivingCompress PDF for SharingCompress Legal PDF Documents

Sut Mae'n Gweithio

Most "free PDF compressor" sites silently upload your PDF to their servers. Here, compression happens entirely in your browser using pdf-lib β€” a popular JavaScript library that reads and rewrites PDF files locally.

  1. 1
    You drop a PDF
    The file is read into your browser's memory as a byte array. Nothing leaves your device.
  2. 2
    pdf-lib parses the PDF structure
    PDFs are essentially containers of fonts, images, and instructions. pdf-lib reads the structure and identifies which embedded images can be re-encoded at lower quality to reduce size.
  3. 3
    Images are re-encoded at your chosen quality
    You choose the quality level. Embedded JPEG images are re-encoded with that quality setting. The lower the quality, the smaller the output PDF β€” but text and vector content remain unchanged.
  4. 4
    A new PDF is written and offered for download
    pdf-lib reassembles the PDF with the compressed images and writes the result to a new in-memory file. Click Download to save it locally.

Safe for contracts, tax returns, medical records, anything sensitive. Your PDF and its contents never reach our server β€” there is no server in this workflow.

Pam defnyddio ein un ni?

βœ“Completely free β€” no hidden costs, ever
βœ“No account, email, or login required
βœ“Files stay on your device β€” processing happens in your browser
βœ“Works on any device β€” phone, tablet, desktop
βœ“No watermarks on any output
βœ“Browser memory limits may apply for very large files

Offer Cysylltiedig

Tueddu
πŸ“Ž

Cyfuniad PDF

Cyfuno ffeiliau PDF lluosog yn un. Llusgwch i aildrefnu tudalennau.

Rhowch gynnig arniFfeiliau aros yn lleol
πŸ“Έ

Delwedd i PDF

Trosi delweddau i PDF. Ail-archebu tudalennau, gosod maint ac ymylon.

Rhowch gynnig arniFfeiliau aros yn lleol
Tueddu
πŸ–ŠοΈ

PDF Redactor

Black out sensitive text in a PDF for good. Pages are flattened to images so the hidden content is permanently destroyed β€” not just covered. Runs entirely in your browser.

Rhowch gynnig arniFfeiliau aros yn lleol
Oedd yr offeryn hwn yn ddefnyddiol?

Cwestiynau Cyffredin