chat screenshots privacy
How to hide names in chat screenshots before sharing
Cover repeated names, check avatars and contact details, then join chat screenshots into one readable image. A practical walkthrough with review tips.
ReadGuides & explainers
Help with the task around the tool: choosing a photo format, scaling a recipe, checking a calculation or preparing a PDF. Start with the guide that matches what you are trying to do.
Worked examples show the inputs and settings used. Follow the linked tool to try it yourself, and check source dates where rates or rules can change.
Published by ToolsNow · Editorial standards · Suggest a correction
heic jpg image conversion
How to convert HEIC photos to JPG without uploading them
Convert one HEIC photo or a batch to JPG, choose quality and dimensions, and understand what happens to Live Photos, HDR and metadata.
Read pdf merge split
How to merge, split and reorder PDF pages
Combine documents, remove blank pages, fix sideways scans and split a PDF into separate files with a visual workspace and undo.
Read privacy images faces
Blurring faces in photos: what automatic detection can and cannot do
Review missed faces, choose between blur and opaque cover, and check the exported photo. A practical guide to the limits of automatic face detection.
Read baking cooking food
How to convert a recipe between different baking pan sizes
Only have a square tin for a round cake recipe? Find out how much mixture to make, what to do with part of an egg and when to check the bake.
Read privacy security images
How to redact an image safely: blur, pixelation or solid coverage?
Cover sensitive image details with opaque blocks, inspect the saved copy and understand why blur, pixelation and removable overlays need different treatment.
Read pdf privacy metadata
What PDF metadata can reveal — and what removing it does not remove
Inspect a PDF's author, title, dates and XMP data before sharing. Learn which fields ToolsNow clears and why page content, comments and attachments need separate review.
Read grades maths education
How weighted grades and required final-exam scores are calculated
Calculate a points-based or weighted grade, handle ungraded categories, and work out a required final-exam score using your course's actual rules.
Read ascii art terminal unicode
ASCII, ANSI and Unicode art: choose an output that survives copying
Keep text art aligned, choose a character ramp, handle terminal colour, and export for Markdown, HTML or an image when the destination changes the formatting.
Read dithering images retro
Floyd–Steinberg, Bayer and Atkinson dithering compared
Choose a dithering method by comparing gradients, outlines and texture. Practical settings for still images, plus how error diffusion, Bayer patterns and halftones work.
Read text regex data
How to extract emails, URLs and numbers from unstructured text
Pull candidate addresses and values from notes or logs, inspect their context, choose duplicate rules, and export a list without mistaking matches for verified data.
Read colour design images
How colour palette extraction works
Choose dominant, balanced or saturated colours from an image, understand the sample percentages and check contrast before using a palette in a design.
Read sprite sheet game dev animation
How to cut and export a sprite sheet
Align a sprite-sheet grid, fix spacing and margin errors, preview the frame order and choose PNG, ZIP, GIF or JSON exports with the right coordinates.
Read cooking baking food
How to scale a recipe without ruining it
Work out a serving multiplier, handle fractions and partial eggs, and choose a suitable tin. What a scaled ingredient list changes and what still needs a decision.
Read pixel art images retro
How to turn an image into pixel art without making it blurry
Choose a small pixel grid, reduce the palette and export at a whole-number scale. Learn how to separate lost source detail from display smoothing.
Read security qr privacy
How to read a QR code safely before opening its link
Decode a QR code before following it, check the actual hostname and recognise the limits of link warnings, shortened URLs and payment prompts.
Read text writing seo
Word frequency and keyword density: use counts to review a draft
Find repeated words and phrases, understand which filters change their percentages, and use frequency counts without treating them as an SEO score.
Read dev data json
JSON vs YAML vs XML: differences, trade-offs and conversion pitfalls
Choose a format for the receiving system, inspect conversion changes to arrays, types and comments, and check what the local converter preserves or loses.
Read pdf print files
PDF crop boxes explained: media, crop, trim and bleed
Trim visible PDF margins and understand the page boxes behind them. Learn why a CropBox change hides content, how print boxes differ and what to check after export.
Read pdf security encryption
PDF password protection explained: encryption vs permissions
Understand passwords needed to open a PDF, reader-enforced print and copy restrictions, and the checks to make before sharing a protected or unlocked copy.
Read images privacy exif
What photo metadata can reveal — and how to remove it
Check photos for GPS, camera and author details, save a cleaned copy and understand the trade-offs around orientation, colour profiles and metadata removal.
Read dev security encoding
Base64 is not encryption: choose encoding, encryption or hashing
Decode a Base64 example, distinguish readable encoding from encryption, and understand why a hash does not make a password or other guessable data secret.
Read dates time business
Business days vs calendar days: work out which dates count
Count a delivery or response window, check whether the starting day counts, and choose the right weekends and holidays for a business-day calculation.
Read money math interest
Compound interest: how a balance grows when interest stays in the account
Compare a lump sum with regular deposits, understand annual and monthly compounding, and check the assumptions behind a savings projection.
Read dev cron time
Cron syntax explained: check when a five-field schedule will run
Read a five-field cron expression, check steps and day matching, and understand the local preview's UTC times and supported syntax.
Read loans money math
How loan amortisation works: reading the payment and interest split
Read an amortisation schedule, check the first two payments, and compare how a loan's rate and term affect monthly payments and total interest.
Read dev security jwt
How to read a JWT: inspect its claims without mistaking decoding for verification
Read a signed JWT's header and claims, interpret expiry timestamps, and check the difference between decoded content and a token your server can trust.
Read images compression
JPEG vs PNG: a practical rule that covers almost every case
Start with JPEG for photos and PNG for sharp text or transparency, then compare the saved result. Practical advice on quality, backgrounds and newer formats.
Read files units storage
MB vs MiB: why a 1 TB drive shows up as 931 GB
Compare decimal MB and GB with binary MiB and GiB, understand the 931 GB display on a 1 TB drive and distinguish capacity from free space.
Read cooking units conversion
Ounces vs fluid ounces: choose the scale or the measuring jug
Convert ounces to grams and fluid ounces to millilitres, distinguish US and imperial measures, and check ambiguous recipe quantities before measuring.
Read math percent statistics
Percent vs percentage points: a small wording difference that changes the number
An interest rate rising from 2% to 3% is one percentage point, and also a 50% increase. Why the two phrasings differ, and the percentage traps hiding in everyday claims.
Read pdf files ocr
Scanned PDF vs text PDF: why you sometimes cannot copy the text
Check whether a PDF contains extractable text, find out when a scan needs OCR and understand why copied words can be missing or out of order.
Read cooking baking units
US, UK and metric cups: which measure does your recipe need?
Check a recipe's cup size, convert liquids into millilitres, and understand when a larger cup changes the proportions rather than just the batch size.
Read dates time iso-8601
Week numbers explained: turn a week reference into a date range
Identify an ISO week and its week-year, compare Sunday-start numbering, and avoid reporting errors around New Year and week 53.
Read dev security files
What checksums are for: verifying a download with a hash
Calculate a file's SHA-256 checksum, compare the complete value with the publisher's, and understand what a match does and does not establish.
Read images pdf print
What DPI actually means (and which number to pick)
Choose a PDF export resolution or work out an image's print size. Learn when changing DPI adds pixels and when it only changes a printing instruction.
Read dates time
What adding a month means for month-end dates
Check month-end offsets, understand clamping and rollover, and keep recurring dates from drifting after February.
Read pdf files compression
Why compressing a PDF sometimes makes it bigger
Compare the actual result before replacing a PDF. Learn when image-based compression can help, why it can enlarge text documents and what features it loses.
Read time dates timezones
Time zone conversion: use the date as well as the city
Convert a meeting time for its actual date, check daylight-saving gaps and repeated hours, and distinguish a named time zone from a fixed UTC offset.
Read mortgage loans interest
What an extra €100 a month actually does to your mortgage
See how extra principal payments change a mortgage payoff date and interest total, with a worked example and the lender rules to check first.
Read baking cooking conversions
Why a cup of flour and a cup of honey are not the same weight
Find a useful cups-to-grams estimate, check the ingredient and cup size, and avoid packing or sifting changes that alter a baking measurement.
Read vat tax invoicing
How to remove VAT from a price
Find the net price and VAT portion of a tax-inclusive total, check a worked example, and handle invoices with more than one VAT rate.
Read