JPG to PDF under 150 KB
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One or two document pages as a PDF below 150 KB, with small print kept legible.
A 150 KB PDF sits between the very tight 100 KB rule and the roomier 200 KB one. It suits a single certificate with a stamp and signature, a national ID card front and back, or a one-page caste or domicile certificate where 100 KB made the seal unreadable. This converter puts your JPG, PNG or HEIC photos into one PDF and re-encodes the page images to fit below 150 KB, with the same quality on every page. It all runs on your device.
How to compress an image to 150 KB
- Add the page photo, or front and back of a card as two separate images.
- Keep A4 and margin 0; set orientation to Auto so a landscape card isn’t squeezed onto a portrait page.
- Convert, read the bytes and JPEG quality in the result, zoom in on the seal and signature, then download.
What happens to quality, size and metadata
The 150,000-byte limit is turned into one budget for all page images, minus room for the PDF’s own structure. The converter tests your actual pictures, picks the highest JPEG quality at which they all fit, and reduces image dimensions only if even low quality is too big. With one page there is typically no resizing at all and quality stays high. The finished PDF is measured; if it overshoots, the budget is tightened and rebuilt. Location and camera metadata are removed.
Where 150 KB is asked for
In India the 150 KB cap is common for single supporting documents on recruitment and admission portals: some state staff selection commissions and teacher recruitment boards ask for the category certificate, the domicile certificate or an EWS certificate as a PDF “not exceeding 150 KB”. Several state scholarship portals use it for income and bank passbook copies, and some university examination forms for the previous year’s mark sheet. Hostel, transport pass and municipal service applications sometimes copy the same rule. The size is printed next to each upload field, often together with a minimum such as 20 or 50 KB.
Tips for clear photos at small sizes
- Use the phone’s document-scan mode if it has one: it flattens and crops the page, and the converter then has less background to spend bytes on.
- Make sure the certificate number and issue date are in sharp focus; those are what an officer checks first.
- Keep each certificate in its own PDF unless the form explicitly asks you to combine them.
JPG vs PDF
| Full name | JPG | |
|---|---|---|
| Full name | JPEG (Joint Photographic Experts Group) | Portable Document Format |
| Introduced | 1992 | 1993 |
| Defined by | JPEG (ITU-T & ISO/IEC) · ITU-T T.81 / ISO/IEC 10918-1 | ISO · ISO 32000 |
| Compression | Lossy | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | — |
| Largest size | 65,535 × 65,535 px | 14,400 × 14,400 pt (200 × 200 in) per page |
| Chrome / Edge | Yes | Yes |
| Safari | Yes | Yes |
| Firefox | Yes | Yes |
| Windows | Yes | — |
| iPhone / iPad | Yes | — |
| Android | Yes | — |
| Typical use | Photos for sharing, email, online forms and printing, where it has to open everywhere. | Documents for sending, printing and uploading: forms, scans, invoices, applications. |
JPG JPG is the lossy photo format standardised in 1992 as ITU-T T.81. It throws away detail the eye barely notices, and the quality setting decides how much. It has no transparency and no animation, but every phone, computer, browser, printer and upload form opens it.
PDF PDF is a page-based document format created in 1993 and an open ISO standard (ISO 32000) since 2008. Each page keeps its exact layout, fonts and images, so it looks the same on every device. A PDF can hold scanned photos, text, vector drawings and forms.
Sources for this table
- www.itu.int/rec/T-REC-T.81
- www.w3.org/Graphics/JPEG/itu-t81.pdf
- developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Image_types
- developer.android.com/media/platform/supported-formats
- www.iso.org/standard/51502.html
- www.iso.org/standard/75839.html
- www.rfc-editor.org/rfc/rfc8118
- www.loc.gov/preservation/digital/formats/fdd/fdd000474.shtml
Browser support data: caniuse.com, CC BY 4.0.
Without this site
No phone or computer has a “PDF under 150 KB” setting. On an iPhone, the Notes document scanner and Files › Create PDF both save full-resolution scans, often 1–3 MB per page. Android’s Print › Save as PDF does the same. On a Mac, Preview’s File › Export with the “Reduce File Size” Quartz filter shrinks the PDF without a target, so you may end up at 40 KB and blurry or 400 KB and rejected.
Troubleshooting
- A coloured stamp turns into a smudge. It needs more bytes than text. Photograph that page closer so the stamp covers more pixels.
- Card scanned on a dark table. The background takes up most of the page image. Crop to the card edges first.
- The form also needs a JPG version. Use Compress image to 100 KB for the image upload and this page for the PDF.
Questions and answers
How do I convert JPG to PDF 150 KB?
Add the JPG on this page, check the page order and press Convert. A single PDF is created with the image compressed just enough to keep the whole file under 150,000 bytes. The result line shows the size and quality reached. Open the PDF, zoom in on the details, and upload it if everything reads clearly.
Can I put both sides of my ID card in a 150 KB PDF?
Yes. Add the front and back as two photos and they become two pages sharing the 150 KB budget equally. Crop each to the card edges first so the bytes go to the text, not the table. Two card sides usually fit comfortably at this size with names and numbers readable.
Is 150 KB enough for a certificate with a seal?
Usually yes for one page. Seals and stamps need more detail than typed text, which is exactly why some portals moved from 100 to 150 KB. If the seal still looks blurred, photograph the certificate closer and in better light rather than adding more pages.
The portal shows my 150 KB PDF as 146 KB. Is something wrong?
No. Our file is at most 150,000 bytes. Systems that count 1 KB as 1,024 bytes display that as about 146 KB, and systems that count in 1,000s show up to 150 KB. Both are within the limit, so the upload should be accepted.