Guides
Direct answers, concrete steps, and the limits of each method. No advice that depends on uploading sensitive files.
Image privacy
24 guides
How to blur the background of a photo
Blur a photo's original background in your browser, keep the subject sharp, repair difficult edges, and know when to take a real depth-of-field photo instead.
Read the guideHow to blur a face, license plate, or address before posting
Obscure private details locally, choose blur, pixelation, or permanent redaction appropriately, and verify the flattened image before sharing.
Read the guideBulk remove backgrounds for Etsy and e-commerce listings
Remove backgrounds from Etsy and e-commerce product photos in free batches of 20, download one ZIP, and understand the real credit-cost tradeoffs.
Read the guideHow to cut out a car photo background
Remove and replace the background around a car while checking windows, mirrors, wheel gaps, reflections, shadows and truthful listing detail.
Read the guideHow to cut out hair, fur and glass from a background
Why hair, fur, glass and thin straps are where background removers fail, and how to check and fix those edges for free in your browser.
Read the guideHEIC to JPG explained: compatibility, quality, and batch conversion
Understand HEIC and HEIF, convert an iPhone photo to JPG locally, choose quality carefully, and compare batch options for larger libraries.
Read the guidePhoto, signature, and PDF size limits for Indian government exams
A maintained, primary-source database of photo, signature, and PDF upload limits for major Indian government exam portals.
Read the guideHow to remove a jewellery or small product photo background
Remove and replace backgrounds around jewellery, watches and small reflective products while preserving fine chains, holes, shine and truthful detail.
Read the guideHow to make an image background transparent
Make a photo, logo or signature background transparent in the browser, save it as PNG or WebP, and check the edges before you use it anywhere.
Read the guideHow to make a logo background transparent
Remove the white or coloured box behind a logo in your browser, keep crisp edges, and export PNG or WebP at the right size for web, slides and print.
Read the guideHow to make a passport-size photo with a white background
Put a photo on a plain white background in the browser, size it to 35 x 45 mm, resize it for an exam or job portal, and know when not to edit it.
Read the guidePreparing an image before you publish it
Rotation software ignores, mirrored photos, upscaling that invents detail, watermarks a crop removes, and the icon sizes a browser actually asks for.
Read the guideHow to prepare a professional profile or CV photo background
Prepare a clear, professional headshot background for LinkedIn, a CV, or a staff profile without uploading the photo to an editing service.
Read the guideHow to remove an image background for free without credits
Compare genuinely free background-removal methods, understand remove.bg's limits, and cut out, refine, and replace a background locally without credits.
Read the guideRemove a photo background on iPhone, Android, Windows or Mac
The background removal built into iPhone, Android, Windows Paint, Mac Preview and Office, what each saves, and when a browser tool does better.
Read the guideremove.bg closes on 1 December 2026. What to do before then
remove.bg's website, self-service API and plugins stop on 1 December 2026. What happens to credits and subscriptions, and where each kind of user can go next.
Read the guideEXIF metadata: what your photos reveal before you share
Learn what EXIF and GPS metadata can reveal about a photo, then remove location data from a JPEG without reducing image quality.
Read the guideHow to remove a white background from an image
Take the white background out of a product photo, logo, icon or scan in your browser, keep soft edges and shadows under control, and save a transparent PNG.
Read the guideHow to replace a photo background without Photoshop
Swap a photo background in the browser with a colour, gradient, blur, or your own image, then match scale, light, edges, and shadow.
Read the guideHow to resize an image to exact pixel dimensions for any form
Match an online form's exact width and height without stretching faces, losing important content, or confusing pixels with DPI.
Read the guideHow to shrink an image under 100KB without it looking bad
Reduce a photo below 100KB by fixing dimensions, choosing the right format, and lowering quality in controlled steps while protecting important detail.
Read the guideHow to make a transparent signature PNG from paper
Turn a signature on paper into a transparent PNG in your browser, then place it on a PDF or resize it for an exam form, without uploading it anywhere.
Read the guideWebP vs AVIF vs JPG: the best image format for the web in 2026
Choose JPG, WebP, or AVIF based on browser reach, image quality, transparency, encoding speed, and the fallback your website can support.
Read the guideWhite background product photos for Amazon, Flipkart and Meesho
Turn product photos into pure white, correctly sized marketplace images in the browser, a whole batch at once, and check them before the listing is rejected.
Read the guidePDF workflows
20 guides
How to add page numbers to a PDF the right way
Add page numbers to a PDF without covering content, pick the right start number and position, and know when numbering needs the source file.
Read the guideHow to combine PDF and image files into one document
Turn JPG or PNG images into PDF pages, combine them with existing PDFs in the right order, and verify the finished document without uploading it.
Read the guidePDF size limits for USCIS online filing
USCIS publishes one upload figure, 12 MB per file, plus format, encryption and file name rules that reject documents for other reasons. What it states.
Read the guideHow to compress a PDF to 100KB, 200KB, or 500KB
Pick the right PDF size target, reduce the file without hiding quality loss, and verify a 100KB, 200KB, or 500KB result before uploading it.
Read the guideHow to compress a PDF to 200KB for SSC or UPSC
Reduce an exam-application PDF toward 200KB without hiding quality loss, and verify the active SSC or UPSC upload rule first.
Read the guideHow to edit a PDF free without Adobe
Learn what free PDF editors actually change, how current limits differ, and how to add text, images, marks, and links without uploading your PDF.
Read the guideHow to fill a PDF form on your phone
Complete interactive or flat PDF forms on iPhone or Android, choose whether to flatten fields, recover local work, and verify the result before submitting.
Read the guideHow to merge PDF files privately without uploading your documents
Combine PDF files locally, preserve page quality, understand document-level limits, and avoid uploading confidential documents.
Read the guideHow to merge PDF files on iPhone
Combine PDFs on an iPhone using Apple Preview where available or a private browser workflow, then verify page order and the downloaded result.
Read the guidePDF/A, PDF/X, or plain PDF: which one do you need?
Choose plain PDF for everyday use, PDF/A for long-term preservation, or the exact PDF/X profile your commercial printer requests, then validate the result.
Read the guidePDF size limits for CM/ECF court e-filing
Federal courts each set their own CM/ECF file size limit, from 7 MB to 200 MB in published figures. What individual courts state, linked to each court.
Read the guideHow to properly redact a PDF
Learn why drawing a black box does not remove PDF data, what true redaction must destroy, and how to verify a redacted document before sharing it.
Read the guideHow to remove a password from a PDF you own
Take the password off a bank statement, payslip, or policy PDF you own, entirely in your browser, plus what to do when the file refuses to unlock.
Read the guideHow to sign a PDF on Windows, Mac, iPhone, or Android
Add a visible signature to a PDF on any common device, choose the right built-in or browser tool, and verify the signed copy before sending it.
Read the guideHow to sign a PDF without Adobe Acrobat
Add a visible signature to a PDF without Adobe Acrobat, understand when Apple Markup works, and know when a certificate-backed signature is required.
Read the guideHow to split a huge PDF into chapters
Plan chapter boundaries, split a large PDF into clearly named page-range files, and verify bookmarks, links, signatures, and page numbers before sharing.
Read the guideTurning notes and web pages into a PDF you can file
Markdown, HTML and spreadsheets become PDFs in different ways, and each loses something. What survives, and when the browser's Print to PDF is better.
Read the guideWhat a PDF keeps and loses as a PowerPoint deck
Converting a PDF to PowerPoint puts each page on its own slide as a picture. What that keeps, what it cannot give back, and when to pick page size.
Read the guideWhy a converted PDF never looks right in Word
A PDF stores glyphs at coordinates, not paragraphs, so converted documents lose layout. What survives conversion, what cannot, and when to stop.
Read the guideWhy your PDF is too big to email and 5 ways to fix it
Find what made a PDF too large for email, choose the least destructive fix, and avoid sending an unreadable document just to cross an attachment limit.
Read the guideFile safety
8 guides
Are online file converters safe? How to check whether a tool uploads your files
Learn how to tell whether an online converter uploads your file, inspect browser network activity, and evaluate privacy claims with evidence.
Read the guideHow to convert text, photos and spreadsheets into the files a form accepts
Turn a .txt file, a WebP or HEIC photo, or an Excel workbook into the PDF or CSV a form asks for, in your browser, without sending the file anywhere.
Read the guideYour file is too big for the Google Form. Here is how to fix it once
Google Forms rejects a file over the limit the form owner set. Find the real limit, compress once to land under it, and avoid repeated quality loss.
Read the guideDoes using an online file converter make it a processor under GDPR?
Uploading a document to an online converter usually discloses personal data to a third party. What that means for Article 28, Article 30 and transfers.
Read the guideWhy QR codes stop working
Most free QR generators encode a link to their own domain and redirect. Learn why printed codes die, and how to make one that outlives the service that made it.
Read the guideUK visa document upload limits
UK visa evidence goes to commercial partner portals, not GOV.UK, and each sets its own upload rules. What GOV.UK publishes, and how to confirm an upload.
Read the guideHow to verify a file checksum
Check that a download arrived intact by comparing its SHA-256 against the published checksum, and understand what that check does and does not prove.
Read the guideWhy your 24 MB attachment is rejected by a 25 MB limit
Email encodes attachments before sending, which adds about a third. Why a file fails a limit it seems to fit, and what size to aim for in Gmail and Outlook.
Read the guideData and CSV
6 guides
How to clean a CSV before importing it
Check delimiters, headers, identifiers, formulas, duplicates, encodings, and row shape before importing a CSV into Excel, a CRM, or a database.
Read the guideHow to convert Excel to CSV without breaking your data
Export an XLSX worksheet to CSV while protecting leading zeros, long IDs, dates, Unicode text, delimiters, formulas, and row integrity.
Read the guideCSV vs JSON vs Excel: which format should you use for your data?
Choose CSV, JSON, or Excel based on data shape, types, formulas, formatting, interoperability, automation, and the next person or system using it.
Read the guideGeocoding a list of addresses without handing it over
Turning addresses into coordinates cannot be done locally. What gets sent, what stays, how to cut the list down first, and why the key is yours.
Read the guideMatching two CSV exports without a database
Two files, one shared column, and a question neither answers alone. What a lookup formula costs, where it breaks, and when a join is the shorter road.
Read the guidePublishing a CSV as a table people can read
A CSV is the smallest way to write down a grid and the worst way to show one. Which format suits a web page, a document or a pull request, and what each loses.
Read the guideText
4 guides
How to clean up text before pasting it somewhere
Text copied from a PDF, email or spreadsheet brings hard line breaks, mixed case, invisible characters and repeated rows. What to fix, and in what order.
Read the guideCounting and measuring a piece of writing
Character counts differ because tools count different things, and readability scores measure sentence length, not clarity. What each number means.
Read the guideWhy two strings that look identical do not match
A lookup fails, a duplicate slips through, a join returns nothing. Four invisible differences cause almost all of it; check them in a fixed order.
Read the guideTurning a page of text into a list you can use
Pulling addresses or links out of prose, removing the duplicates without losing the right spelling, and formatting the result for wherever it has to go next.
Read the guideDeveloper
3 guides
How to decode a JWT safely
Decode JWT header and payload claims locally, tell inspection from verification, and keep bearer tokens out of websites, screenshots, logs and tickets.
Read the guideDeveloper utilities without pasting secrets into a website
People paste production data into regex testers, timestamp converters and JWT decoders without thinking. What each is for, and why where it runs matters.
Read the guideHow long should a password be?
Password strength is measured in bits of entropy, not in symbols and capital letters. Learn what length actually buys you and why composition rules do not.
Read the guide