Guides

Each guide answers one choosing question that no single tool page answers: which converter, format, edit or calculator fits the job. Guides never repeat tool instructions — they state the difference and link to the tools they compare.

• CSV to JSON or JSON to CSV: which direction do you need?Decide whether to convert CSV rows into JSON objects or flatten JSON back into spreadsheet rows, with examples of each.
• JPG, PNG, or WebP: which image format should you choose?Pick the right output format for photos, graphics, and web uploads by comparing how JPG, PNG, and WebP handle quality and size.
• Which PDF tool do you need: merge, split, extract, or tidy?Match your PDF job — combining files, separating pages, pulling a range, rotating, or numbering — to the tool built for it.
• JSON formatter, tree viewer, or CSV: which one do you need?Decide whether to format and validate JSON, explore it as a tree, or flatten it into spreadsheet rows.
• Read, re-delimit, or convert a CSV: which step comes first?Choose between browsing a large CSV, changing its delimiter, turning rows into JSON, or building CSV from plain lines.
• Format XML, validate it, or convert it to JSON?Match your XML job to the right tool: readable indentation, structural validation, or a documented JSON mapping.
• Resize, crop, or compress an image: which edit do you need?Pick the image edit that solves your problem: fewer pixels, a smaller frame, or a smaller file at the same dimensions.
• One image for every social size: preset, resize, or crop?Choose between preset social exports, manual pixel resizing, cropping, and ratio checks for multi-platform images.
• Embed an image as Base64 or keep it a separate file?Decide when a Base64 data URL helps and when it quietly makes pages, emails, or JSON payloads heavier than needed.
• Delete, extract, or split PDF pages: which keeps the rest intact?Tell apart three page-removal tools by what happens to the pages you did not choose: gone, moved, or still there.
• Reorder pages or merge files: which PDF job do you have?Separate two easily confused jobs: fixing the order inside one document, and combining several documents into one.
• Crop or resize PDF pages before printing?Decide whether to trim white margins or rebuild the page geometry when a PDF does not match the paper in the tray.
• Read or rewrite PDF metadata: which tool changes what?Choose between inspecting a PDF's declared properties and deliberately rewriting the title, author, and keywords.
• JPG, PNG, or mixed photos to PDF: which converter?Pick the image-to-PDF converter that matches your file types and whether transparency must survive the conversion.
• Clean messy text in the right order: spaces, duplicates, accentsSequence five text cleaners so each one sees the problem the previous step removed, without creating new damage.
• Bold, italic, cursive, or blackletter: which Unicode style?Compare Unicode pseudo-styles, where they survive, and when to convert styled text back to plain ASCII.
• Wrap, justify, or pad text to a fixed width?Choose the width tool that matches the output: reflowed paragraphs, even edges, or a rigid character grid.
• Split delimited text or extract one column?Match four column tools to the job: turning one field into many, pulling one out, adding a constant, or swapping two.
• Turn lines into a comma list, CSV, or combined text?Decide between a single separated list, real CSV columns, line-by-line concatenation, and word pairing.
• Compare, replace, or filter text: which fixes the difference?Choose between seeing what changed, changing every match, and keeping only the lines that match a pattern.
• Title case, snake_case, or a URL slug: which casing?Pick the right casing tool for prose headings, code identifiers, URLs, and accidental all-caps text.
• Check, find, or build a palindrome?Tell apart testing one phrase, discovering palindromic words inside a passage, and constructing a new palindrome.
• Invisible characters: zero-width, blank lines, or stray spaces?Diagnose which kind of invisible content is causing a layout, validation, or copy problem before removing it.
• Basic meta, Open Graph, or Twitter Card: which tags do you need?Separate the three head-tag groups by audience: search results, link previews, and X card rendering.
• Canonical or hreflang: which duplicate problem are you fixing?Distinguish same-language duplicates from translated versions that should coexist in search results.
• Robots.txt or sitemap: which one tells crawlers what?Choose the right control for blocking paths, advertising URLs, or mapping old addresses to new ones.
• Discount price or percentage change: which answer do you need?Choose between sale pricing, general percent maths, tip splitting, and adding tax to a displayed price.
• VAT or sales tax: add it or extract it?Pick the consumption-tax calculator by direction: net to gross, gross to net, or a discount applied before tax.
• Markup or margin: which number do you quote?Understand why the same cost and price produce two different percentages, and which one belongs in a quote.
• Loan payment or compound growth: which calculator?Choose between modelling money you repay, money that grows, and the return on an investment you already made.
• YouTube title, TikTok hook, or email subject: which comes first?Sequence creator copy correctly: promise, first-second hook, inbox subject, and marketplace title each do a different job.
• Etsy title or product description brief: which one first?Decide whether to start from marketplace search terms or from a structured description brief before writing listing copy.
• Hash, encrypt, or obfuscate: which protects what?Match three very different operations to their real purpose: integrity checks, confidential recovery, and casual hiding.
• JSON, HTML, CSS, JavaScript, or SQL: which formatter?Pick the formatter by language and know which ones parse safely, which keep licenses, and which never execute code.