UK Visa Uploads: UKVCAS 6 MB, VFS Global 2 MB, and the Silent Rejection
UKVCAS allows 6 MB, VFS Global 2 MB, TLScontact around 4 MB. The dangerous part is not the limit — it is that oversized files fail to attach without any error message.
UK visa document uploads have a failure mode that is worse than rejection: the silent failure. The progress bar completes, the interface looks satisfied, and the file simply never appears in your document list. You find out weeks later, or not at all.
It happens because each commercial partner running UKVI's upload portals enforces its own per-file cap, and files at or slightly over the cap tend to fail without a clear error.
Which portal you are on, and what it allows
| Portal | Used for | Reported cap per file |
|---|---|---|
| UKVCAS (Sopra Steria) | Biometrics and uploads inside the UK | 6 MB |
| VFS Global | Most application centres outside the UK | 2 MB |
| TLScontact | France, Switzerland, parts of MENA and Africa | ~4 MB |
| Direct UKVI routes | Some special schemes | Varies |
The spread matters more than the numbers suggest. A bundle that uploads perfectly from inside the UK will fail at VFS Global, which is the strictest of the three and the one most overseas applicants use.
Build in a safety margin
Because oversized files fail quietly rather than loudly, the working rule is:
Target 10 to 15 percent under your portal's cap. For VFS Global's 2 MB limit, aim for about 1.7 MB. For UKVCAS's 6 MB, aim for about 5 MB.
Then refresh after every single upload and confirm the file appears in the document list before moving on. That one habit prevents the worst outcome in this entire workflow.
Formats: what is accepted and what is not
| Format | Status | Note |
|---|---|---|
| Preferred | The most reliable choice; never converted server-side | |
| JPG / PNG | Accepted | Best for single-page items |
| HEIC | Rejected | iPhone photos — convert to JPG before uploading |
| Word / Excel | Rejected | Save as PDF first |
| TIFF | Rejected | Convert to PDF |
| ZIP | Rejected | Do not archive your documents |
The HEIC issue catches a lot of applicants: photos taken on an iPhone are HEIC by default and are rejected. On iPhone, set Camera → Formats → Most Compatible, or convert before you build the PDF.
Bundle by category, not all in one
This is the single most useful structural decision you can make. On portals that allow separate uploads per category — most VFS portals do — each file only needs to be under the cap individually. The total can be much larger.
So instead of one 12 MB master bundle that fails everywhere, build:
- Passport and identity documents in one PDF
- Financial documents in another
- Employment and qualifications in another
- Accommodation, relationship evidence, and so on separately
Category bundles also match how a caseworker reviews a file, so it is better organization regardless of size.
What fits, realistically
| Bundle type | Typical size |
|---|---|
| Single text-heavy document (employer letter, contract) | 100–500 KB |
| Bank statements, 6 months, one account | 500 KB – 1.5 MB |
| Skilled Worker bundle, no photographs | 1–3 MB |
| Spouse or family bundle with photo evidence | 3–8 MB raw |
| Bundle with multiple high-resolution passport scans | 5–15 MB raw |
Photographs are what push a bundle over. If your raw bundle is very large, the first question is not "how do I compress this?" but "am I including evidence nobody asked for?"
Getting a bundle under the cap
- Scan at 200–300 DPI, not 600+. Higher resolution adds size without adding information a caseworker can use.
- Use grayscale for text-only documents. Bank statements, employer letters, and contracts rarely need color.
- Resize phone photos before building the PDF. Around 1200×1600 on the long edge at roughly 80% JPEG quality is a sensible target.
- Convert HEIC to JPG first.
- Combine the pages into one PDF with the merge tool, which runs in your browser.
- Compress if still over. Open the compress tool and reduce it to your target. Passport scans and financial records are processed on your device, not uploaded anywhere.
- Open the result and check the small print and stamps. A file that is under the cap but unreadable is worse than one that failed.
The visa photo is a separate requirement
Do not confuse the document upload with the photo requirement. For the GOV.UK digital route, a visa photo must be JPG or JPEG, at least 600×750 pixels, between 50 KB and 6 MB, taken against a plain light-colored background, with no digital alteration and no shadows.
If your appointment instructions ask for printed photos instead, they will specify 35×45 mm. Follow the appointment PDF, which is the source of truth for your route.
Official sources
- Apply for a UK visa — GOV.UK — the application route and where document upload fits
- How to take a photo for a visa application — GOV.UK — official digital photo requirements
- UKVCAS FAQ — the in-country provider's own help pages
Portal caps are enforced by commercial partners and are not published as one consolidated specification, so the upload page remains authoritative.
Before you upload
- You know which portal you are on and its cap
- File is 10–15% under that cap
- Format is PDF (or JPG/PNG for single pages) — not HEIC, Word, TIFF, or ZIP
- Bundled by category, not one master file
- Photos resized to ~1200×1600 before the PDF was built
- Every page checked for legible small text and stamps
- Refreshed after uploading to confirm the file actually attached
Frequently asked questions
What is the file size limit for UK visa uploads?
It depends on which portal handles your application. UKVCAS, used for in-country biometrics, is reported at 6 MB per file. VFS Global, used in most countries outside the UK, is reported at 2 MB. TLScontact is typically around 4 MB.
Why did my UK visa document upload disappear?
Oversized files frequently fail silently on these portals — the progress bar completes, but the file never appears in the document list. Stay 10 to 15 percent under the limit and refresh after every upload to confirm it attached.
What file formats do UK visa portals accept?
PDF is preferred and is the safest choice. JPG and PNG are generally accepted for single-page items. Word and Excel files, HEIC photos, TIFF, and ZIP archives are typically rejected.
How small can I compress a UK visa bundle?
A text-heavy document such as an employer letter typically compresses to 100 to 500 KB, and six months of bank statements to roughly 500 KB to 1.5 MB. Bundles containing photographs are the ones that struggle.
Related comparisons
Source-led comparisons written by BytesPDF, with the conflict of interest disclosed on each page. They link official provider documentation rather than fabricated tests.