1Drop your JPEG images into the box above, or pick them from your device — there is nothing to install and no account to create.
2Choose how hard to squeeze: a quality or bitrate target, and optionally smaller dimensions if size matters more to you than detail.
3Start the job and let the workers re-pack the file; your original is never modified in place.
4Compare the new size against the original, then download the compressed JPEG file.
Compress JPEG FAQ
Is there anything specific to JPEG I should know before compressing?
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Yes — the .jpeg and .jpg extensions are the same bitstream, so nothing here behaves differently from a .jpg — only the filename changes. It is worth knowing before you overwrite an original you might need again.
What do I get back, and can I control the trade-off?
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A single compressed file per input, at a quality or bitrate level you choose rather than a fixed default. If the result is not small enough, changing the dimensions or the duration will do more than pushing the quality slider further down.
How does Compress JPEG actually make the file smaller?
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Concretely, the encoder re-runs the DCT quantiser at the quality factor you choose, so the saving comes from coarser coefficients rather than from fewer pixels — the dimensions of the picture never change, and quality 80 is the usual sweet spot. Nothing about it depends on you installing software: the job runs server-side and hands back a finished file.
How much smaller will my file get?
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That is decided by the content, not by the tool. Photographic detail and film grain resist compression; flat colour, text and silence collapse. A realistic expectation is a large reduction on anything with big uniform regions and a modest one on a busy photograph or a high-motion clip.
Does Compress JPEG cost anything?
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No. Compress JPEG is free with no account, no watermark on the output and no signup wall in front of the download. Uploads are deleted automatically a short time after the job finishes.
What can I upload to Compress JPEG?
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Anything in the lossy raster family — JPG, JPEG, JFIF and WebP — plus the lossless formats (PNG, BMP, TIFF) if you want to mix them in one batch. The format is read from the file header, not the extension, so a photo saved with the wrong suffix still goes through.
Is there a file size limit on Compress JPEG?
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Yes: free accounts process images up to 25 MB each, which covers essentially every camera JPG and phone photo; the work is done by libjpeg-turbo and libwebp, the same libraries a desktop editor links against. Larger files are the one thing the free tier will stop you on, and the limit is per file rather than per batch.
What happens to EXIF and colour profile data?
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Camera EXIF (ISO, shutter, lens, GPS) and the embedded ICC profile are carried across by default, because dropping the profile is what makes colours shift on re-import. Use the privacy option to strip metadata before download if you are about to publish the file.
Why does a MP3 site host Compress JPEG?
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MP3.to is built around the format that made portable audio ordinary: universally playable, small enough to ignore, and lossy in a way that only matters if you keep re-encoding it. Audio jobs cluster: the same person who needs a format changed usually needs the file cut, levelled or made smaller in the same sitting. Putting Compress JPEG behind the same upload, the same caps and the same account is what turns three tabs into one.
What should I do with the result once Compress JPEG is finished?
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The converter on this site moves audio between MP3, WAV, FLAC, M4A, OGG and Opus, so the output format is a decision you can leave until the end rather than commit to at the start. Doing that after Compress JPEG rather than before means the encode happens once, on the file you actually settled on, instead of twice.
Is Compress JPEG here the same tool the sibling sites run?
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The engines are shared — the same ffmpeg build, the same workers, the same limits. What a MP3 site adds is a point of view about bitrates, about what survives an encode and about when a lossless intermediate is worth the upload time. It also starts from one fact about the format this site is named after: MP3 frames are fixed-size blocks, so a cut lands on a frame boundary and gapless playback markers do not survive a re-encode.
Do I need an account, and does anything get kept?
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No account, and nothing is kept: uploads are deleted from the workers shortly after the job finishes, nothing is listened to and nothing is indexed. Free accounts exist for history and batch size, not for access.
