A photo timestamp is lettering burned directly into the pixels of an image so viewers see when the picture was taken—or when you want them to believe it was taken—without opening a metadata panel or a separate caption file. Film cameras popularized this idea with small orange or red LED segments embedded in the corner of prints and slides, a visual habit that still signals authenticity, nostalgia, and documentary intent decades after digital capture became the default. Today, social feeds, insurance portals, and construction management systems mix screenshots, scans, and camera originals; a visible stamp communicates capture context on the image itself, which survives downloads, crops, and recompressions that might otherwise strip EXIF or confuse album sorting.
SynthQuery’s Photo Timestamp Adder is a free, browser-based utility that recreates that film-era discipline with modern flexibility. You upload JPG, PNG, WebP, BMP, or TIFF files, optionally read capture timestamps from embedded EXIF when the camera or phone recorded them, and render a live Canvas preview before you export. Choose international date layouts, add or omit clock times, nudge typography and opacity, snap placement to a nine-point grid, and switch on a vintage LED style that echoes classic point-and-shoot readouts. Batch mode walks your queue so each photo can respect its own EXIF date while sharing one visual recipe—ideal for event rolls or site documentation—then you download individually or as a ZIP assembled entirely inside your tab. Nothing in that raster pipeline uploads to SynthQuery; the same privacy posture applies as on our text watermark and logo tools, so confidential job-site imagery can stay on-device while you still produce shareable proofs.
Understanding limits keeps expectations honest. EXIF dates are metadata, not courtroom-grade chain-of-custody; they can be absent, wrong, or edited before your file arrives. This tool renders what you choose—EXIF-derived or manually typed—onto pixels; it does not notarize files or replace sworn statements. Pair visible stamps with archival masters, written procedures, and counsel when disputes hinge on timing. For marketing copy that accompanies dated imagery, SynthQuery’s AI Detector and Humanizer remain useful checks before publication.
Why visible stamps still matter
Thumbnails in DAMs, PDF appendices, and chat attachments often hide metadata panels. A corner date answers “when was this?” at a glance, which helps reviewers who never open inspector tools. The aesthetic also nods to analog workflows that clients associate with candid documentation.
EXIF versus what you type
EXIF frequently stores DateTimeOriginal near the moment of capture, but exports, editors, and messenger re-encodes may reset fields to export time. Use per-photo overrides when you know the true moment, and fall back to a global default when a batch lacks tags.
What this tool does
The workspace pairs a queue of source images with a control column tuned for both phones and desktops. Drag-and-drop or the file picker accepts common raster formats up to the stated per-file size limit, and each row shows decode status, a thumbnail, optional per-photo datetime overrides, and quick download actions once you are happy with styling. A selected row drives the live preview, which re-renders on a short debounce so sliders stay responsive even on large TIFFs.
Date formatting spans four philosophies. Presets cover United States month-first ordering, day-first ordering common in much of Europe, and ISO-style year-month-day strings suited to filenames and logs. Custom patterns expose tokenized placeholders—year, month, day, hour, minute, second, and meridiem markers—so compliance teams can mirror internal templates without maintaining multiple exports. An include-time toggle pairs with twelve- or twenty-four-hour presentation for presets, while custom strings honor the AP token when you opt into twelve-hour output.
Typography controls start with curated web-safe stacks—system UI, Arial, Verdana, Georgia, Times, Courier, monospace, and Impact—so text renders without bundling font binaries into JavaScript. A size slider scales stamp height relative to the image using the same maximum-edge clamp other SynthQuery Canvas utilities employ, which protects mobile GPUs from oversized canvases. Color and opacity pickers fine-tune contrast against skies, concrete, or dark interiors; vintage mode swaps the palette for a monospace, orange-red LED simulation with glow passes that mimic older segment displays. Placement uses a nine-point grid with adjustable margins so you can mirror classic bottom-right stamps or move credits to safer negative space. Background options include a bare letterform or a semi-transparent rounded rectangle that improves legibility on busy textures.
Batch workflows emphasize per-file intelligence. A “use each file’s EXIF date” control clears overrides and prefers embedded capture timestamps when present, while a global fallback datetime covers scans or exports that lack originals. “Stamp all” renders every ready image with the current style recipe, storing blobs for ZIP packaging; individual downloads remain available for spot checks. Export format matching keeps JPEGs as JPEG when browsers allow, with PNG fallbacks for BMP or TIFF sources that lack encoders, paralleling our watermark and frame utilities.
EXIF reading strategy
The page dynamically imports exifr, reads ArrayBuffers locally, and prefers DateTimeOriginal, then CreateDate, ModifyDate, and generic DateTime. Parsed strings accept the classic colon-separated EXIF date format as well as ISO-like fragments before they are turned into JavaScript Date objects.
Vintage LED rendering
Vintage mode layers bright core fills, hotter secondary passes, and softened outer shadows atop monospace strokes to suggest illuminated segments. It intentionally ignores manual color and opacity sliders so the aesthetic stays coherent; switch off vintage to regain full chromatic control.
ZIP packaging
After stamping, JSZip bundles exports without routing archives through SynthQuery infrastructure—identical to other batch image tools on the domain. Filenames append a clear suffix before the extension so originals and stamped derivatives sort cleanly.
Technical details
EXIF date fields typically store ASCII strings such as “YYYY:MM:DD HH:mm:ss” in tags like DateTimeOriginal. The browser-facing parser normalizes colon-separated dates into ISO-like substrings JavaScript can instantiate as Date objects, while already-revived Date instances from exifr pass through unchanged. When multiple tags compete, the tool prefers the original capture field to avoid accidentally labeling files with desktop export times.
Canvas rendering draws the decoded image, measures the formatted string with the active font, maps a nine-point bounding box through shared grid math from the SynthQuery text watermark library, and optionally fills a rounded semi-transparent rectangle before painting text. Non-vintage fills honor RGBA opacity with subtle shadow offsets for separation from noisy backgrounds. Vintage mode issues multiple fillText passes with increasing warm hues and blur radii proportional to font size to emulate segment bleed.
Exports call HTMLCanvasElement.toBlob with MIME negotiation identical to other utilities: matching preserves JPEG, PNG, or WebP when encoders exist, while BMP and TIFF sources export as PNG unless you force a different raster type. Large canvases clamp to a maximum edge to reduce GPU pressure; typography scales with the same factor so composition remains stable.
Color management
Browser Canvas targets sRGB for these tools. Wide-gamut masters may shift slightly when rasterized; mission-critical print workflows should proof in ICC-aware desktop software after export.
Custom pattern tokens
Tokens such as YYYY, MM, DD, HH, mm, ss, and AP replace in order after the string is built. Twelve-hour custom output depends on the AP token plus the time12h toggle so meridiem markers do not appear unexpectedly.
Use cases
Construction and facilities teams photograph progress weekly; stamping each image with an unambiguous date reduces disputes about which pour or inspection a thumbnail represents when folders arrive out of order. Event photographers delivering hundreds of proofs can batch EXIF-aware stamps so every JPEG carries the capture day while sharing one typographic style, helping guests find their session without exposing full metadata panels. Insurance adjusters and homeowners documenting storm damage often need human-readable timelines inside PDFs; flattened stamps travel with crops that might otherwise lose EXIF during compression.
Legal and compliance workflows sometimes pair visible dates with written statements. This tool produces demonstrative visuals quickly, but attorneys should treat stamps as communicative overlays—not tamper-proof timestamps—and retain untouched originals. Nostalgic creators mimic film-era aesthetics for social campaigns, pairing vintage LED mode with frames from the Photo Frame adder when art direction calls for coherent retro branding. Travel bloggers juggling mixed cameras can normalize presentation even when phone and DSLR metadata differ, using overrides for scans of boarding passes or train tickets.
Education teams archiving lab experiments appreciate on-image dates beside whiteboards, while ecommerce studios marking sample shots with capture days keep internal SKU reviews aligned with shoot calendars. Whenever captions or listings need a second editorial pass, run companion copy through the AI Detector or Humanizer to keep disclosures consistent with the imagery you publish.
Evidence and authenticity
Visible dates help triage evidence packets, but they do not replace hash-preserving archives, witness statements, or certified digital workflows. Use EXIF when accurate, and disclose manual stamps when metadata was unreliable.
Client-facing nostalgia
Vintage LED styling reads as playful for consumer brands yet may feel off-brand for clinical B2B imagery. Preview carefully before batch exporting finals.
Mixed batches
Combine per-file EXIF preference with overrides only where needed; the queue UI keeps exceptions localized so you are not retyping dozens of identical corrections.
How SynthQuery compares
Hardware date stamps baked times into negatives with no post-processing, but they offered one font, one color, and little control over international formats. Desktop suites provide unlimited layers yet assume licensed software, saved actions, and time to batch script. Lightweight web apps sometimes omit ZIP export, ignore EXIF per file, or upload your photos to remote GPUs. SynthQuery targets photographers and operators who need a middle path: no account wall for this pass, no server round trip for pixels, yet enough formatting depth—presets, custom tokens, vintage styling, nine-point placement, and batch ZIP—to replace ad hoc screenshot tools for many real-world jobs.
Aspect
SynthQuery
Typical alternatives
Privacy posture
Decode, draw, and ZIP inside the browser tab; no SynthQuery upload for image bytes.
Hosted editors may stream files to shared workers or require accounts.
Date intelligence
Per-file EXIF preference with overrides plus a global fallback.
Some tools only stamp “now” or one manual value for the entire batch.
Formatting breadth
Regional presets, optional time, custom token patterns, vintage LED styling.
Minimal sites expose only a single locale or font size.
Placement
Nine-point grid with adjustable margins and semi-transparent backing.
Corner-only or center-only placement without margin control.
Cost
Free while you use the page alongside other SynthQuery utilities.
Subscriptions may paywall batch or ZIP features.
How to use this tool effectively
Begin with the highest-quality sources your policy allows. If you must remove GPS or other sensitive metadata before publication, run SynthQuery’s Remove EXIF or Geotag Remover first, then stamp derivatives that are safe to share.
Open the Photo Timestamp Adder and add images via drag-and-drop or the browse control. Each row displays loading spinners while the browser decodes pixels and a short EXIF scan resolves capture times when available. Select a row to focus the preview pane; you will see the formatted string that will burn into that photo given current settings.
Choose how dates resolve. Enable “prefer EXIF” to let each file contribute its own capture timestamp when tags exist, set a default datetime for files without EXIF, and use the per-photo override field when one image needs a manual correction—handy for scanned prints or messenger downloads that rewrote metadata. Press “Batch: use each file’s EXIF date” to clear overrides and reaffirm per-file tagging before large jobs.
Pick a format preset or switch to custom tokens if your organization mandates a particular layout. Toggle time inclusion and twelve-hour presentation when needed. Adjust font, size, color, and opacity (unless vintage mode is on), then pick a grid slot and margin that matches your composition. Enable the semi-transparent background when text must survive busy textures.
Watch the live preview update, then press Download on a single row to validate bytes. When the style is final, choose Stamp all to render the queue, and either download files individually or bundle them with Download ZIP. If downstream channels require specific dimensions, follow with the Image Resizer or a social preset page documented elsewhere in the catalog.
Validation and errors
Unsupported extensions never enter the queue, and oversize files surface toast notifications. Decode failures show per-row messages instead of blocking unrelated images, mirroring other SynthQuery batch utilities.
Preview versus export resolution
Previews encode as PNG blobs for quick feedback, while final exports respect your format selector. Large sources may scale down to a maximum edge for stability; font sizes and margins scale proportionally so relative placement stays consistent.
Keyboard and assistive cues
Sliders, switches, selects, and grid buttons expose labels and pressed states for screen readers. The preview region announces updates politely so assistive tech knows when a new render is ready.
Explore the complete SynthQuery directory for additional utilities beyond the free hub subset (see also https://synthquery.com/tools).
Frequently asked questions
ISO-style YYYY-MM-DD sorts lexicographically in filenames and avoids the ambiguity of slash-separated month-day orders. For human viewers accustomed to day-first reading, choose the DD/MM/YYYY preset. United States audiences typically expect MM/DD/YYYY. When legal templates mandate a bespoke layout, switch to custom tokens and document the pattern in your style guide.
After you add a file, the tool loads exifr locally, inspects common date tags—DateTimeOriginal first—and converts string values such as “2024:08:09 15:22:01” into JavaScript Date objects. If the camera never wrote a tag or software stripped it, the row notes that EXIF is missing and falls back to your default datetime until you supply a per-photo override.
Yes. Keep “prefer EXIF” enabled, clear per-photo overrides with the batch EXIF button, and use Stamp all. Each ready image resolves its own capture time when metadata exists; the shared style controls apply uniformly. Files without EXIF inherit the global fallback you set in the datetime picker.
On-image text is a communicative overlay, not a cryptographic proof. Courts and insurers evaluate chain of custody, corroborating evidence, and original masters. Use stamps to help human reviewers understand timelines, consult qualified counsel for jurisdictional requirements, and retain unmodified archives when disputes are plausible.
Vintage mode locks monospace stacks and warm orange-red coloring so the glow simulation stays coherent. Toggle it off to regain full font, color, and opacity control when you need brand-aligned stamps instead of nostalgic aesthetics.
Browsers lack universal BMP or TIFF encoders. Matching-original mode therefore falls back to PNG for those sources while preserving JPEG, PNG, or WebP when encoders exist. You can also force PNG, JPEG, or WebP explicitly from the export menu.
Focusable controls include switches, sliders, selects, buttons, datetime inputs, and the nine-point grid, each with descriptive labels or aria-pressed states. The preview region exposes polite live updates when renders complete.
No. Files are read with the File API, decoded with object URLs, processed on Canvas, and zipped with JSZip if you request an archive. Network traffic covers the web app shell and optional font or analytics assets, not your image bytes.
This tool changes pixels. If you need invisible metadata edits or filename patterns, pair workflows: maintain masters elsewhere, then produce flattened derivatives here for sharing. SynthQuery’s Remove EXIF utility handles metadata stripping; dedicated rename tools may appear in the broader catalog at https://synthquery.com/tools over time.
Yes, sequentially. Stamp dates first, download PNG or JPEG, then open those exports in the Text Watermark, Logo Watermark, or Photo Frame tools for additional layers. This ordering keeps typography predictable because each pass rasterizes anew.
Burn a visible date and time into photos—like classic film camera stamps—with optional vintage LED styling, EXIF-aware batch processing, and individual or ZIP export.
Drag & drop images here, or
JPG, PNG, WebP, BMP, TIFF · up to 40.00 MB each · max 24 files