JPEG to PBM

Upload a JPEG file and download it as PBM. Free to start.

Drop files here, or press Enter to choose them. Up to 50 MB per file.
Drop a JPEG file hereFree · up to 50 MB · 10 operations in total without an account · or paste with Ctrl+V
  • Sent over HTTPS · link expires in 24 h

How it works

  1. Step 1:

    Drop the JPEG file on the orange block above, or press “Choose JPEG”.

  2. Step 2:

    Press “Convert to PBM”. The block shows the progress while the server converts the file.

  3. Step 3:

    Press “Download” to save the PBM file. On Free the link works for 24 hours.

How JPEG to PBM conversion works

JPEG is an image format: it uses lossy DCT compression that permanently discards fine pixel detail to achieve small file sizes, ideal for photographs. PBM is a document format that stores data in the PBM format. This embeds the raster image inside a document container, fixing its dimensions on the page. Metadata such as creation date is preserved where the target format supports it; features the target format cannot represent are dropped. Converting between these two formats is common when the source application does not support PBM natively or when the target platform only accepts PBM. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and returned through a private download link that expires after 24 hours on Free.

Sources and specifications

Quality levels for JPEG → PBM

LevelFile sizeSpeed
Low qualitySmallest file, basic qualityVery smallVery fast
Medium qualityRecommendedBalanced size and qualityMediumFast
High qualityLarger file, great qualityLargeModerate
Maximum qualityLargest file, best possible qualityVery largeSlow

Image Tip: For photos, Medium quality offers the best balance. For graphics with text or sharp edges, use High or Maximum quality to preserve clarity.

When to convert

What the PBM file is good for and why people convert to it.

  • Creates a true 1-bit monochrome bitmap from JPEG content
  • Produces smaller, deterministic files for simple black/white artwork
  • Convert scanned page images into black/white bitmaps for OCR preprocessing
  • Generate 1-bit masks for image segmentation or documentation markup

Where your file goes

  • It travels to our server over an encrypted HTTPS connection and is converted there.
  • The PBM file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.
  • Want the file to stay on your device? Private Mode converts images right in the browser. Open Private Mode

Questions and answers

What people ask before converting JPEG to PBM.

Ask supportAll questions
Is PBM quality the same as the original JPEG?
No—JPEG is lossy and PBM is 1-bit. Converting to PBM requires thresholding, so fine grayscale details are collapsed into black or white.
Will the PBM preserve colors from a JPEG?
No—PBM supports only monochrome (black/white). The converter must map JPEG pixels to a single luminance value before binarization.
Why might the PBM file be much smaller than the JPEG?
PBM stores a 1-bit bitmap, so pixels are represented as black/white bits rather than JPEG’s compressed DCT data; the size drops especially for simple images.
Are JPEG and PBM equally compatible with image editors?
JPEG is widely supported for photos, while PBM is mainly used for 1-bit bitmaps and may be limited in editing tools. PBM is, however, common in bitmap/mask workflows and legacy systems.

Many files at once? Starter converts 5 at a time, 100 a day.

See plans