Reduce PDF size

Choose text/vector-preserving optimization or separate raster compression.

Drop PDF files hereProcess many files at once

No upload · processed on this device

Reduce PDF size

Choose text/vector-preserving optimization or separate raster compression.

How it works

Open the source file
Choose the processing mode and settings
Run, inspect the result and download

Supported formats

PDF → PDF — Input decoding and output encoding depend on browser support.

What this tool does

Optimize compatible embedded JPEG images while retaining text and vector objects.

Implementation and verified quality

advanced · selective embedded JPEG optimization / optional raster mode. Quality qualification is in progress. Pro/Flagship quality has not been established.

Before you export

Preserve mode retains native text/search/vectors; forms flatten and signatures are not retained. Raster mode removes searchable text. The writer still parses full documents in a Worker.

Frequently asked questions

What determines the supported size?

Actual device memory, storage and codec support. Tested examples are evidence, not a guarantee for every file. advanced

Are my files uploaded?

Nerulio processes selected files on your device and has no file-upload API. Optional engines and models are downloaded from third parties; those requests expose connection information such as your IP address.

Will my work be saved automatically?

No. Images and editing state stay in this tab; media output can use local temporary storage. Changing language preserves your work; reloading, closing the tab, or following a link to another page can clear it.