KB-first compression
We tune quality until your file lands inside the min–max KB window — not just “smaller”.
Size to KB · Free · Private
Size to KB — photo & signature to the exact limit your form needs
Official sizetokb.in tools: compress to 20KB / 50KB / 100KB / 200KB, plus PDF to JPG, unlock PDF — for SSC, Railway, UPSSSC, IBPS, UPSC and more.
Private · nothing saved On-device · no upload Free · no signup
Start here
Tools people actually download
- Signature 10–20KBHotPET / SSC / Bank signature size
- Reduce KB · 50KBHotReduce KB free — photo to 50KB
- Compress to 20KBHotStrict photo / signature caps
- Handwritten declarationBankSBI / IBPS 50–100 KB
- Thumb impressionBank / police thumb KB
- Compress to 100KBGDS / UPSC style ceiling
- Increase size to KB/MBFile too small? Pad into range
- Upload checkerPreflight KB + pixels
- PDF to JPGPages → images · optional 50KB
- Join photo + signatureTSLPRB / combined JPG uploads
High-demand right now
Where Google already shows Size to KB
SSC CHSL#1 clicks · signature 10–20 KB · till 7 OctISRO ICRBHigh CTR · photo resizerUIIC AOForms · till 28 Sep · declaration packSarkari bioBio data PDF with photo · freePDF to JPG 50KBConvert PDF → JPG · KB capGDS photo size30–100 KB · India Post guideMarksheet PDFHigh CTR · compress for uploadSize reducerReduce KB · photo to 50KB
Exact KB tool
Reduce KB — set any min–max
Crop → compress photo or signature → Free Download. Searched “reduce kb”? Start here.
Settings
Select or drag & drop imageThen crop & rotate · JPG, PNG, HEIC · Max 10 MB
How Size to KB works
Exact KB for Indian exam forms — in your browser
Size to KB is for students and job aspirants who need a photo or signature inside a strict KB band (often 20–50 KB photo, 10–20 KB signature) before SSC, Railway, Bank, India Post or state portals will accept the upload.
- 1. Pick a tool — exam preset, Reduce KB, signature cleaner, or a form guide.
- 2. Crop, then compress — so bytes go to the face or ink, not empty background.
- 3. Free Download — then upload that JPG to the official form. Files stay on your device; we don’t save them.
Read more on About Size to KB · Privacy · Fix size reject errors.
All tools
Reduce size to KB & more — pick a tool
Everything stays in your browser. Search or jump a category — start with reduce-to-KB.
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Reduce size to KB
- Custom reduce to KBHotDedicated custom min–max KB page
- Reduce image sizeHotCompress photo to 20 / 50 / 100 KB
- Reduce KB · 50KBHotReduce image size in KB — most forms
- Compress to 20KBHotStrict portal photo / sign size
- Compress to 100KBHotUPSC / NEET style uploads
- Compress to 10KBHotTight signature / portal limit
- Compress to 200KBHotImage compressor to 200KB
- Compress to 500KBLarger scan / certificate max
- Increase size to KB/MBHotFile too small? Pad into min–max KB or ~1 MB
- Reduce signature sizeHotClean ink and hit 10–20 KB
- Exam photo + sign packReduce both to KB, one ZIP
- Bulk reduce to KBHotMany photos → one ZIP
- Form photo wizardHotPreset packs for portals
- Upload error fixerHotPaste error → exact KB fix
- Reduce PAN photoPAN card photo to KB
- Reduce Aadhaar photoUIDAI-style photo to KB
- Thumb impressionClean & reduce to 10–40 KB
Photo & signature
- Handwritten declarationHotIBPS/SBI 800×400 · 50–100 KB
- Join photo + signatureHotOne JPG for combined uploads
- Upload checkerHotKB + pixels preflight before submit
- Passport photo makerHot3.5×4.5 cm, crop, background, print
- White backgroundPlain wall → white for forms
- Crop photoCrop then reduce to KB
- Merge imagesJoin photos side by side
- Flip / rotateMirror or turn before upload
- Color to B&WGrayscale or pure black & white
- Name & date on photoHotStamp name + date on exam photo
PDF tools
- Compress PDFHotShrink PDF toward target KB
- Marksheet PDF shrinkHot200 / 500 KB presets
- Reorder PDF pagesDelete / reorder then shrink
- Edit PDFHotText, highlight, draw, images
- Merge PDFHotCombine certificates into one
- Split PDFExtract pages from a PDF
- JPG to PDFHotImages → PDF (huge search demand)
- JPG to PDF exact KBHot50–100 / 200 / 500 KB PDF bands
- PDF to JPGHotPDF → JPG · optional 50KB cap
- Unlock PDFHotRemove PDF password
Convert & edit
More helpers
- Watermark FOR UPLOADStamp photo or PDF safely
- Photo guidelines checkBrightness, blur, framing tips
- Form upload guidesHotLong guides for PET, GDS, 50KB, SBI
- Size kam kaise kareHotHindi SEO guide + tools
- Signature size kam kareHindi guide → 10–20KB
- PDF size kam kareHindi guide → compress PDF
- Check photo sizePixels, KB, print estimate
- Mask ID numbersBlur Aadhaar before sharing
- Biodata / resume makerHotSarkari biodata → print PDF
- Age as on dateHotExam cut-off age calculator
Always available
Custom — set your own min / max KB
No exam match? Use the tool on this page — exact size rules from your notification.
Or pick an exam preset
220 profiles · open forms listed first · KB targets on each row
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- Custom size to KBUse tool ↑
- APPSC Arunachal TechnicalPhoto 20–50 · Sign 10–20 KBOpen
- Bank of India SOPhoto 20–50 · Sign 10–20 · Thumb 20–50 KBOpen
- Ladakh Police ConstablePhoto 20–50 · Sign 10–20 KBOpen
- MP Police SI / SubedarPhoto 20–50 · Sign 10–20 · Decl. 20–100 KBOpen
- OPSC Assistant Public ProsecutorPhoto 20–50 · Sign 10–20 KBOpen
- OSSSC RadiographerPhoto 20–100 · Sign 20–50 KBOpen
- PFRDA Officer Grade APhoto 20–50 · Sign 10–20 · Thumb 10–50 KBOpen
- SBI SCO Wealth ManagementPhoto 20–50 · Sign 10–20 KBOpen
- SSC CHSLSign 10–20 · Photo 20–50 KBOpen
- SSC JESign 10–20 · Photo 20–50 KBOpen
- TNPSC CTSE (Interview Posts)Photo 20–50 · Sign 10–20 KBOpen
- UIIC AOPhoto 20–50 · Sign 10–20 · Thumb 20–50 KBOpen
- UPSSSC Livestock Extension OfficerSign 10–20 · Photo 20–50 KBOpen
Why SizeToKB
Built around the kilobyte, not a generic resize slider
Exam portals reject files by KB. SizeToKB is shaped for that constraint — presets when you know the exam, Custom when you only have the notification PDF.
Stays on your device
Photos and signatures are processed in the browser. We don’t upload or save your files.
Custom when presets miss
Notification says 15–40 KB? Open Custom and type it. Custom is always pinned on the home page.
Exam shortcuts
One-tap presets for popular recruitments so you skip guessing dimensions and ranges.
Signature clean-up
Optional high-contrast pass for ink-on-paper signatures before they hit the KB target.
PDF helpers
Merge photos into a PDF or slim an existing PDF when the portal caps document size.
Frequently Asked Questions
Size to KB is the free exam photo & signature site at sizetokb.in (also sizetokb.com). Compress photos and signatures to the exact KB your SSC, Railway, Bank or state form needs — privately in your browser.
Reduce image size & signature size online free (KB)
Millions of aspirants in India search for ways to reduce image size, reduce photo size online free, and reduce signature size in KB before uploading to sarkari and entrance exam portals. SizeToKB is built for that exact job: compress your JPG until it fits 20KB, 50KB, 100KB — or any min–max range from your notification — without installing an app.
How to reduce photo size for online form fill
Pick your exam preset or open Custom. Upload the photo, then download when the tool shows your file inside the allowed KB window. Common targets: reduce photo size to 50KB, reduce photo size to 20KB, compress image to 100KB, change photo size in KB for SSC / UPSC / NEET / Railway / IBPS uploads. Also covers photo size kam kaise kare and image size reduce online free searches.
How to reduce signature size for SSC, Bank & Railway
Portals often reject signatures outside 10KB–20KB. Use SizeToKB to reduce signature size online, compress signature to 10KB or 20KB, and optionally apply a high-contrast clean-up so ink stays readable. Useful for SSC CGL / CHSL / MTS / GD signature size, IBPS signature size, RRB signature size, and anyone searching signature size kam kaise kare or how to reduce signature size for SSC.
Popular KB targets aspirants type
- compress image to 50kb
- compress image to 20kb
- compress image to 100kb
- photo size kam kaise kare
- pdf to jpg
- unlock pdf / remove password
- reduce image size in KB
- reduce image size for online form
- resize photo to 20kb 50kb
- resize signature to 10kb 20kb
- JPG compressor online free
- passport size photo maker
- SSC photo size & signature size
- UPSC photo size
- NEET / JEE photo size
- Railway RRB NTPC photo size
- IBPS / SBI clerk photo size
- decrease image size online
- make photo smaller KB
- photo for online application
- sarkari form photo size
PET signature size · Section Controller photo resizer · Reduce KB
Google already shows Size to KB for PET signature size, UPSSSC PET photo editor, RRB Section Controller signature / image, and India Post GDS photo size. Open those exam pages, compress, Free Download, upload.
Also: SBI Clerk / IBPS RRB bank packs (photo, signature, thumb, handwritten declaration), compress to 20KB / 50KB / 100KB, and signature cleaner.