How to Compress a PDF for Free in 2026: Under 1 MB, No Upload Limit, Text Still Sharp (Smallpdf, iLovePDF, Adobe, PDF24, Jobbit)
Compress a PDF to under 1 MB, 2 MB, 5 MB or 10 MB for email, job portals and HMRC uploads without blurring the text: what makes a PDF big, the size each destination accepts, the steps that keep scans readable, and how the Jobbit PDF compressor does it from a form, with the before and after size reported.
The email bounces because the attachment is 27 MB. The job portal says "maximum 5 MB". The tenancy application wants your scanned bank statements under 2 MB each. So you google "compress PDF", upload the file to the first site, and either it comes back blurry, asks you to sign up after two tasks, or tells you the file is over the limit for free accounts. Adobe reports that PDF is still the format for almost every official document, and every one of those portals has a different cap, so this problem is not going away.
This guide shows you how to compress a PDF to the size you actually need, in one attempt, without turning a contract into a smudge. You will learn what makes a PDF big (it is almost always the images), which size each destination really accepts, how to reduce PDF size to a target such as under 1 MB, and how to check the result before you send it. And you will see the shortest route: the Jobbit PDF compressor, where you attach the file, pick the size you need and what is in it, and get the compressed file back with the size before and after, with no upload limit and no card.
Need the file small today, not a tutorial? Attach your PDF to the free PDF compressor, pick under 1 MB, 2 MB, 5 MB or 10 MB, and Jobbit shrinks it, checks the text is readable and reports both sizes. No card, no upload limit, no daily cap.
Compress a PDF on Jobbit in one message
The Jobbit PDF compressor is a form with four choices and a file. You attach the PDF on the page (drop it in or choose it), pick how small it needs to be (under 1 MB, 2 MB, 5 MB, 10 MB, or as small as possible), say what is in it (mostly text, scanned pages, photos and graphics, or slides) and what it is for (reading on screen, printing, or searchable text with OCR). The page shows you the message it will send, and sends it, with the file, the moment you have a free account. This is the message for the default choices:
1I am going to attach a PDF in this chat. Get it under 1 MB. It is mostly text, such as a contract, CV or letter. It only needs to look good on screen. Keep the text readable, tell me the size before and after, and give the file back with the same name plus '-compressed'.What happens next is the part no free site does. Jobbit opens the file in its own workspace, looks at what is inside (scanned images, embedded fonts, photos, duplicated resources), picks the settings that reach your target with the least visible loss, then reads a few pages of the result to confirm nothing went blurry. You get the file, the two sizes, and a line such as "page 3 is a scan at 300 dpi, I kept it at 150 dpi so the signatures are still legible". If the target cannot be reached without harming the scan, it says so and offers the next option, for example splitting the file in two.
Because the file is now in a chat, the next step is one more sentence: "now merge it with the cover letter", "remove pages 4 to 6", "give me a Word version", "run OCR so the scan is searchable". The free plan includes 100 credits a day, which covers several compressions, and there is no card to enter. If you handle documents every day, the Plus plan at £15 a month adds a larger monthly pool, but a single compression is a free-plan job.
What actually makes a PDF big
A PDF made from a text document is usually 100 to 500 KB. When one reaches 20 MB, one of these is the reason:
- Scanned pages. A scanner set to 600 dpi colour produces 5 to 15 MB per page. Most portals and every human reader are happy with 150 to 200 dpi in greyscale, which is 10 to 20 times smaller.
- Photos pasted at full size. A phone photo is 3 to 6 MB; office apps embed the original even when it is shown as a thumbnail.
- Embedded fonts, repeated. Some export settings embed the full font for every page or every image caption.
- Layers, forms and hidden content from design tools, which stay in the file long after they stop being visible.
- Print-quality export settings. "High quality print" keeps everything at 300 dpi and above.
Compression tools work on the first two. That is why "compress" sometimes does nothing on a text-only PDF (nothing to squeeze) and sometimes cuts a scan by 90%. Telling the compressor what is in the file, which the Jobbit form asks you outright, is what turns a guess into a result.
Which size do you actually need?
| Destination | Typical limit | Ask for |
|---|---|---|
| Gmail, Outlook, Apple Mail attachment | 20 to 25 MB per message | Under 10 MB to be safe across recipients |
| WhatsApp document | Up to 2 GB, but slow on mobile data | Under 5 MB |
| Job application portals | 2 to 10 MB per file | Under 2 MB |
| Council, court and government forms | Often 5 to 10 MB per upload | Under 5 MB, or per-page splitting |
| HMRC and accountancy portals | Usually 10 MB or less per file | Under 5 MB |
| Tenancy and mortgage applications | 2 to 10 MB per document | Under 2 MB, statements one per file |
| Website download or email newsletter | No hard limit, but load time matters | Under 1 MB |
| Print shop | No limit, quality matters | Do not compress; send the original |
The limits vary by provider and change without notice, so take these as ranges and check the form itself. When a target is given, ask for a little under it: a portal that says 5 MB sometimes counts in a way that rejects a 4.99 MB file. The presets on the Jobbit form ("email attachment", "government or job portal upload", "brochure for the printer") set the target, the content type and the purpose in one click.
Step by step: under 1 MB without blurring the text
This is the order Jobbit follows, and the order to follow yourself if you use another tool.
- Find out what is inside. If the PDF is a scan (you cannot select the text with the cursor), you are compressing images and need to protect legibility. If it is a text document, compression will do little and the size probably comes from a few pasted photos.
- Set a target, not a level. "Under 1 MB" or "under 5 MB" is something a tool can aim for; "medium" is a guess.
- Reduce resolution before quality. A 300 dpi scan can go to 150 dpi with no visible loss on a phone or screen. Only then reduce JPEG quality, and never below about 60%.
- Convert colour scans to greyscale when colour carries no meaning (contracts, statements, letters). It roughly halves the size on its own.
- Split before you crush. If a 60-page bank statement must be under 2 MB for a portal that accepts several files, three files of 20 pages at good quality beat one unreadable file.
- Check three pages: the first, the densest table and any signature page. Zoom to 200%. If a 9-point footnote is still readable, the file will pass.
- Keep the original. Save the compressed file with a suffix and never overwrite the source; you will need it for print or for a portal that wants full quality.
Merge, split, OCR and convert in the same chat
Compressing is rarely the whole task. On Jobbit the same chat that shrank the file carries on:
- Merge: "combine the cover letter, CV and certificates into one PDF in that order, then compress it under 5 MB".
- Split: "split this into one file per statement month and name them by month".
- OCR: "make this scan searchable so I can select the text, then compress it". Free sites usually put OCR behind a paid plan or a page cap; here it is part of the job, and the "searchable text" option on the form asks for it up front.
- PDF to Word: "give me an editable DOCX version, keeping the tables". Ask for a check on tables, which is where conversions go wrong.
- Redaction: "black out the account numbers on pages 2 and 3, then flatten the file so the numbers cannot be recovered". Check the output yourself before sending anything sensitive.
- Fill and sign: "fill in the form with the details below and add my signature image at the end".
If you use these often, the best online PDF tools compared goes tool by tool, and the 40 free online tools people google most shows which other small jobs work the same way.
Why Jobbit instead of a free PDF compressor site
The sites you will meet when you search all compress a PDF. The difference is what they ration and what they check.
| What you need | Free PDF compressor sites | Jobbit PDF compressor |
|---|---|---|
| No daily limit | Smallpdf allows 2 tasks a day on the free tier, then a paid plan | 100 credits a day on the free plan, and a compression uses a small part of them |
| No file size cap | iLovePDF caps the free tier per tool; others cap free accounts by megabytes | No upload cap on the page; the file goes straight into your own workspace |
| Control over the result | Adobe's online compressor offers low, medium or high; most sites offer basic or strong | You name the target size, what is in the file and what it is for |
| Someone checks the result | Nobody; you open the file and squint | Jobbit reads pages back and tells you what it kept and what it reduced |
| The next job in the same place | PDF24 has a wide toolset, each tool its own page | Merge, split, OCR, convert, redact and sign in the same chat, then any other job |
The point is not that those sites are bad; for a single small file most of them are fine. It is that a PDF is rarely one job, and a compression that ends in a chat where the next step is one sentence saves the second, third and fourth site. General assistants such as ChatGPT, Claude, Gemini and Microsoft Copilot can run a compression script on a file you attach, and agents such as Manus and Meta's Muse can do the same; what they lack is the form that removes the writing and the workspace where the next document job is one sentence, which is why the comparison of multipurpose agents puts Jobbit first for small businesses.
Privacy: what happens to your PDF
Bank statements, contracts, payslips and ID scans are the files most people compress, so the privacy question is not theoretical.
- On Jobbit the file stays in your own workspace. It lives in your account, is not published anywhere, and you can delete the chat and its files whenever you like.
- On a free site, read the deletion policy. Reputable sites state a deletion window; if a site does not say, assume it keeps the file. A working compressor with no company name and no policy page is not worth the risk for a bank statement.
- Redact before you compress, not after. Compression does not remove information; a blacked-out box drawn over text can be lifted off unless the file is flattened, which is why the redaction request above ends with "flatten".
- Do not paste documents into a general chatbot whose settings allow training on your inputs without checking them first.
Mistakes that make a compressed PDF fail
- Compressing a text-only PDF and expecting a miracle. It is already small; the size is coming from something else, usually one embedded image.
- Choosing "strong" on a scan. The file passes the upload and the reviewer cannot read the figures.
- Compressing twice. Each pass throws away more. Go back to the original and compress once to the right target.
- Ignoring the page limit. Some portals cap pages, not megabytes; split instead.
- Sending the compressed file to the printer. Keep the original for print.
- Trusting the filename. "final-compressed-v3.pdf" is not proof; open it and check the pages, or let the compressor report what it did.
A 15-minute plan for a stack of documents
- Minute 0 to 3: sort. Put scans in one folder, text documents in another, and note the size limit for each destination.
- Minute 3 to 8: compress with a target. One trip to the PDF compressor per file: attach it, pick the size and the content type, sign up once with an email address, and the file comes back with both sizes.
- Minute 8 to 12: merge or split in the same chat to match the portal: one file per statement month, or one bundle for the job application.
- Minute 12 to 15: check and name. Open each result, zoom on a dense page, rename to something the recipient understands (Smith-bank-statement-Aug-2026.pdf), and keep the originals in a separate folder.
Frequently asked questions
How do I compress a PDF to under 1 MB for free?
Reduce the resolution of any scanned pages to 150 dpi and convert colour scans to greyscale, then lower image quality only as far as needed. On the Jobbit PDF compressor you attach the file, choose "under 1 MB" and "scanned pages", and it does exactly that, checks a dense page, and reports the before and after size. Free plan, no card.
Why is my PDF so large?
Almost always because of images: scanned pages at high resolution or full-size photos pasted into a document. A text-only PDF is usually a few hundred kilobytes. Compression works on the images, which is why it can cut a scan by 90% but does little to a plain document.
Does compressing a PDF reduce quality?
Compressing images inside the PDF reduces their resolution or JPEG quality, so past a point the text on scans gets soft. Reducing 300 dpi to 150 dpi is invisible on screen; going below 100 dpi or using extreme settings makes small text hard to read. Reduce resolution first, quality second, and check the result, or let Jobbit check it and tell you.
Which free PDF compressor has no limits?
The well-known sites ration free use by tasks per day, tasks per hour or megabytes per file. The Jobbit PDF compressor has no upload cap and no task limit beyond the free plan's 100 credits a day, which a compression barely touches; the file goes straight into your own workspace rather than onto a shared service.
Is it safe to upload bank statements to a PDF compressor?
Only to a tool that states a deletion policy and that you trust, and never to an unnamed site. On Jobbit the file stays in your own account, is not published, and you can delete the chat whenever you like. Redact account numbers before compressing if the recipient does not need them.
Can I compress a PDF on my phone?
Yes. The Jobbit form works in the phone's browser: attach the PDF from Files or Google Drive, pick the size, and the compressed file comes back in the chat. Check the result on the phone by zooming in on a dense page.
What is the fastest way to compress, merge and convert a PDF in one go?
Describe the whole job in one message: "merge these three files in this order, compress the result under 5 MB and give me a Word copy of the first one". Open the free PDF compressor, attach the files, sign up with an email address (no card), and Jobbit does the sequence and reports the sizes. You can carry on with the next job in the same chat.