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🔒 No uploadText stays selectableHonest size report

Merge & Compress PDF to 100 KB, 200 KB, 500 KB or 1 MB by AIMerger

Combine PDFs, JPGs, PNGs and WebP photos into one PDF that fits an upload limit. You choose the maximum size; we keep text selectable, shrink only the photos and scans inside, and show you the real result before you download — including when a target can’t be reached.

🔒 Processed locally in your browser — your files never leave your device
1

Add PDFs and images

They are combined in the order shown. Pages from every file appear below as thumbnails.

🗜️ Drop PDFs and images here, or tap to choose

PDF · JPG · PNG · WebP · iPhone HEIC — up to 50 files

2

Choose the size limit

We use the gentlest compression that fits. Text stays selectable unless you choose image-only mode.

Maximum file size
Advanced options
How to make it smaller
3

Merge, check & download

You see the real size, a side-by-side preview and what was changed — before you download.

🔒 Combined and compressed on your device. No upload, no account, no watermark.

Limits on this device

Up to 50 files and 1,500 pages at once; roughly 500 MB in total on a computer and less on phones and tablets. Password-protected PDFs need the password removed first. Very image-heavy documents can take a minute — you can cancel at any time.

Merge & Compress PDF — a real example made with this tool from sample files

Four files, 3.4 MB in total → one 185 KB PDF, with the text still selectable.

How to use the merge & compress tool — 4 steps

  1. 1

    Tap the box and choose your PDFs and photos (or drop them in). Every page appears as a thumbnail — drag pages, or use ◀ ▶, to put them in order. ↻ rotates a page.

  2. 2

    Pick the maximum size the form or portal accepts: 100 KB, 200 KB, 500 KB, 1 MB, 2 MB, or type your own.

  3. 3

    Press Merge & compress. The tool first saves the combined PDF without changing anything; only if that is too big does it re-compress the photos and scans inside, as gently as possible.

  4. 4

    Check the result: the exact size, what was changed, and a side-by-side preview (zoom in to check small print). Then press Download PDF.

💡 Tip: Government and job portals often allow 200 KB or 500 KB per document. If a scanned form won’t fit, scan it at 150–200 DPI in black-and-white or grayscale before adding it — small, clean scans compress far better than phone photos.

How the size target works

Most PDF compressors run every page through the same aggressive setting. This one works in steps and stops at the gentlest one that fits:

  1. Lossless first. The combined PDF is saved with compact object streams. If it already fits, nothing in your document is changed.
  2. Then only the pictures. Photos and scanned pages inside the PDF are re-encoded as JPEG, starting at high quality and stepping down in size and quality until the file fits. Text, fonts, links, form fields and vector drawings are not touched, so the text stays selectable and searchable.
  3. A readability floor. We stop before small print becomes blurry. If the target still isn’t reached, you get the real size and three choices — allow lower quality, switch to image-only mode, or use a slightly bigger target. A file is never labelled as meeting a target it misses.

Lossless optimisation vs. lossy image reduction

Lossless means the pages are exactly the same — only the way the file is stored changes. It typically saves a little on documents made by older software and nothing on files that are already tidy. Lossy means some picture detail is thrown away to save space: fine for photos and grey scans, visible on tiny print if pushed too far. The result panel always tells you which was used, and shows the same page before and after so you can judge.Image-only (“scanned”) mode is available in Advanced options for cases where nothing else fits. Every page becomes a picture, which is often the smallest possible file — but the text is no longer selectable or searchable, links stop working and accessibility tags are lost. It is never used unless you choose it.

Limitations and troubleshooting

  • “Target not reached” on a text-only PDF: its size comes from text and embedded fonts, which we keep exactly. Removing pages (with Remove PDF Pages) or splitting it (Split PDF) is the way down.
  • Password-protected PDFs can’t be combined — open them in your PDF reader, remove the password, save, and add them again.
  • Digitally signed PDFs: any change creates a new file, so the digital signature will not be valid in the result. The visible signature image stays.
  • Black-and-white fax-style scans and CMYK images are kept as they are; they are usually already compact.
  • Large files on phones may run out of memory — combine fewer files at once, or use a computer.

Frequently asked questions

How do I compress a PDF to 200 KB?

Add the PDF above, choose 200 KB and press Merge & compress. The tool keeps the text sharp and shrinks only the photos and scans inside until the file is under 200 KB. If 200 KB isn’t reachable without making small print unreadable, it tells you the real size and offers options instead of pretending.

Can I merge several PDFs and photos and then compress them?

Yes — that is what this tool is for. Add PDFs, JPGs, PNGs, WebP or iPhone HEIC photos, reorder the pages with thumbnails, set a maximum size and download one PDF.

Will the text in my PDF stay selectable?

Yes, in the default mode. Only pictures are re-compressed; text, fonts and vector graphics are copied as they are. Image-only mode, which turns pages into pictures, is clearly labelled and only used if you choose it.

Why couldn’t it reach my target size?

Either the PDF is mostly text and fonts (which are kept exactly), or reaching the target would make the pictures too blurry to read. You’ll see the actual size and can allow lower quality, try image-only mode, or pick a larger target.

Are my files uploaded?

No. Everything — combining, compressing and the preview — runs in your browser on your device. You can disconnect from the internet after the page loads and it still works.

Is there a limit?

Up to 50 files and 1,500 pages at once on a computer, less on phones. There is no daily limit, no account and no watermark.

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